Vaccination Against Typhoid/Enteric Fever

Prepared by Mufti Adil Farooki, MD, Shaykh Mateen Khan, MD and Dr. Ramzan Judge, PharmD


The injectable vaccine Typhim Vi is permissible for Muslims as a vaccine for typhoid fever and is preferred over oral Vivotif.


Enteric fever, also known as “typhoid fever”, is a severe systemic illness characterized by fever and abdominal pain caused by the bacteria Salmonella enterica serotype Typhi. Typhoid fever infects roughly 21.6 million people (incidence of 3.6 per 1,000 population) and kills an estimated 200,000 people every year[1].

From the CDC[2]:

“People who are actively ill with typhoid fever and people who are carriers of the bacteria that cause typhoid fever can both spread the bacteria to other people.  When someone eats or drinks contaminated food or drink, the bacteria can multiply and spread into the bloodstream, causing typhoid fever.

Typhoid fever can be a life-threatening disease.  Symptoms of infection include persistent high fever, weakness, stomach pain, headache, diarrhea or constipation, cough, and loss of appetite.

People who do not get treatment can continue to have fever for weeks or months. As many as 30% of people who do not get treatment die from complications of typhoid fever. There are fewer antibiotic treatment options as drug-resistant typhoid bacteria has become more common in many parts of the world.

Typhoid fever is common in many regions of the world, including parts of East and Southeast Asia, Africa, the Caribbean, and Central and South America.  Typhoid fever is not common in the United States.”

CDC Indications for Vaccination:

According to the CDC, routine typhoid vaccination is not recommended in the United States, but is recommended for[3]:

  • Travelers to parts of the world where typhoid is common. (NOTE: typhoid vaccine is not 100% effective and is not a substitute for being careful about what you eat or drink.)
  • People in close contact with a typhoid carrier.
  • Laboratory workers who work with Salmonella typhi bacteria.

Vaccines Available in the United States

There are two typhoid vaccines available in the United States: Vivotif, an oral vaccine, and Typhim Vi, an injectable vaccine.

  1. Vivotif[4]
    • Manufacturer: Crucell Switzerland LTD
    • Form: capsule
    • Contains:  Viable S. typhi Ty21a, Non-viable S. typhi Ty21a,sucrose, ascorbic acid, amino acids, lactose, magnesium stearate, bovine gelatin
    • Culture Medium: digest of yeast extract, an acid digest of casein, dextrose and galactose
  2. Typhim Vi[5]
    • Manufacturer: Sanofi Pasteur
    • Form: injection
    • Contains: purified Vi polysaccharide, formaldehyde, phenol, polydimethylsiloxane, disodium phosphate, monosodium phosphate, sodium chloride, sterile water
    • Culture Medium: semi-synthetic medium. Casein derived raw materials are used early in manufacturing during the fermentation process

Discussion and Recommendations:

For Muslims who require typhoid vaccination, the injectable form, Typhim Vi, is permissible to use.  The capsule form, Vivotif, contains bovine gelatin, which is hydrolyzed collagen extracted from collagen-containing tissue like skin and bones. The cows from which this material is derived are not slaughtered in accordance with Islamic law. Due to the difference of opinion regarding bovine gelatin’s permissibility for consumption, it is preferable and more cautious for Muslims to use the injectable form of the vaccine.

From an Islamic perspective, preventing a health threat such as typhoid fever in high-risk patients is considered to be a necessity[6]. People for whom typhoid vaccination is indicated are considered to be at high risk for getting the infection with a significant potential for serious complications[7],  and infections may be difficult to treat due to rising antibiotic resistance[8]. Although the injectable form is preferred, Muslims may use the oral form if the injectable form is not accessible or is contraindicated (due to allergies or hypersensitivity).

[1] J Prev Med Hyg. 2017;58(1):E1–E8.


[3] ibid



[6] For further discussion, see

[7] N Engl J Med. 1984;310(2):82.


An Islamic Basis for the Use of Vaccines with Impermissible Ingredients

Prepared by Mufti Adil Farooki, MD. Approved by Mufti Abdul Muqtadir Sikander

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Background on Vaccination

A vaccine is a “product that stimulates a person’s immune system to produce immunity to a specific disease, protecting the person from that disease”[1]. Vaccination is the process of administrating a vaccine, most commonly by an injection, with the immediate goal of achieving “active immunity” in the recipient of the vaccine.  Active immunity involves the “stimulation of the immune system to produce antigen-specific humoral (antibody) and cellular immunity”, and can last for many years, sometimes even a lifetime[2].   Vaccination benefits the immunized patient directly and also indirectly benefits unimmunized people through “community immunity”.  This occurs when there are enough people who are immune to an infection to decrease the risk of its transmission, and it also protects people who cannot receive vaccines due to young age or other contraindications[3].

Studies have shown that vaccination is one of the most effective preventative health measures.  After routine childhood vaccines were introduced, the number of cases for most vaccine-preventable diseases has dropped by over 90% in the United States[4]. According to statistical models, for children born between 1994 and 2013, it is estimated that routine vaccination will prevent 322 million illnesses, 21 million hospitalizations, and 732,000 deaths over the course of their lifetimes[5].  

Issue: Impermissible Ingredients in Vaccines

Based on the above findings the benefits of vaccination are clear.  In the United States, routine vaccination is required for public-school children in all 50 states, with possible exemptions varying by state.[6] In certain industries such as healthcare, employees are required to receive vaccination for their own protection as well as the protection of patients.   However, many vaccines contain ingredients that are considered impermissible for Muslims to consume, regardless of whether they are ingested or injected. Some examples are porcine gelatin, calf serum and material from growth mediums that include human, chicken, and monkey cells[7]. If a permissible version of a particular vaccine is not available, then a question arises: is it permissible for a Muslim to receive that vaccine, given that he or she does not currently have that disease and is not guaranteed to be infected by it in the future?  

Principle: Necessity Permits the Unlawful

A general principle in Islamic law is that: “الضرورات تبيح المحظورات”, or “necessity permits the forbidden”, to the extent of the need[8].  Preservation of health and safeguarding of possessions are considered to be a necessity (ضرورة), and this includes protection from serious illness and death.  Something that is otherwise unlawful can be allowed to occur when a person fears that his health or possessions would be harmed, even if he does not have absolute certainty the harm will actually occur.  In other words, the expectation of a particular outcome (غلبة الظن) is considered to be sufficient. According to the principles of Islamic law, this “expectation” is simply defined as thinking that an outcome is more likely to occur than not occur. [9]  In other words, if there is greater than a 50% expectation that a particular outcome will occur, then this is considered to be “ غلبة الظن ”.

For example:

  • If a person is sick and (based on his experience or on the advice of a doctor) he expects to get worse if he fasts during Ramadan, he would be excused from fasting that day and can make up the fast after Ramadan.[10] 
  • If a person is sick and he expects (based on his experience or the advice of a doctor) that performing wudu would make his sickness worse or prolong it, he can perform tayammum[11]
  • A person performing salah must break his salah if he fears that a blind person may fall into danger and he is able to prevent that person from falling into harm. [12]
  • A person performing salah can break his salah if he fears that a thief will steal his possessions if he were to remain busy in prayer[13]

The Importance of Avoiding Populational Harm

These examples apply to the preservation of an individual’s health and safeguarding of possessions. In each case, the threat of harm to an individual (ضررخاص) permitted something that is normally unlawful. According to the principles of Islamic law, the preservation of populational health and wealth is even more important and emphasized.  Therefore, avoiding populational harm is given preference to avoiding harm to an individual[14]. There are numerous examples in which something that is otherwise unlawful and causes harm to an individual is allowed or even required to occur in order to preserve the health and wealth of (i.e. prevent harm to) a group of people[15].  This applies even when there is an expectation (غلبة الظن) of some populational harm, not only when the harm is already occurring or is certain to occur.[16]   Examples include:

  • Forcing landowners to create a dam around a river on their property when there is fear that the water will flood and harm other people[17],[18],[19]
  • Putting restrictions on the type of business transactions that a person can engage in when it is feared that he will harm others by his reckless spending habits, cheating or inability to conform with rules of Islamic law[20]
  • Preventing a doctor from practicing or a judge from ruling due to their ineptitude in order to prevent potential harm to others
  • Forcibly taking down the wall of a privately-owned building when the wall is leaning on a public path and there is fear that it will collapse onto the path and harm people[21]
  • Forcibly selling the possessions of a person in debt in order to avoid continued harm to those whom he owes money [22]
  • Forcibly selling the food of a person who is hoarding it in times of famine in order to aid the general population, even if he refuses to sell it[23]

Application of these Principles to Vaccination

The examples above illustrate the following principles of Islamic law:

  1. Necessity permits the unlawful, to the extent of the need
  2. Preservation of health is considered to be a necessity, therefore avoiding serious threats to health is also considered to be a necessity
  3. An expectation of harm is sufficient to be considered as a threat to health, defined as being more likely than not that the harm would occur (greater than 50% expectation).
  4. Based on #2 and #3, an expectation of harm can be considered necessary to avoid and therefore can allow for the unlawful to be permitted when there is no permissible alternative
  5. The preservation of populational health is emphasized more than the preservation of individual health

Based on these principles, we have seen that in order to prevent a potential harm to the larger population (ضرر عام), a subset of the population is subjected to something that is normally unlawful (ضرر خاص).  These principles can be applied to determine if Muslims can use vaccines when there is only an impermissible version of the vaccine available.  If it is determined that a necessity (ضرورة) exists, then this vaccine would be administered to a portion of the population in order to prevent harm (in terms of morbidity/mortality) to the general population.  In other words, something that is unlawful and involves consumption of impermissible ingredients (ضرر خاص) would be permitted to be used in order to prevent harm to the greater population (ضرر عام) if necessity is established.  

Also, as in the examples discussed, there is an expectation (غلبة الظن) that the harm will occur, but not certainty.  This expectation of harm is based on the known epidemiology of the infection and on clinical trials.  And as in the examples above, the use of something that is unlawful is only allowed to the extent of the need.  In the case of vaccination, if a version of the vaccine with permissible ingredients becomes available, then it would no longer be necessary to use versions with impermissible ingredients to achieve immunization. In that case, Muslims would be required to only use the version with permissible ingredients. This is in line with rulings given by contemporary Islamic scholars stating that vaccines with impermissible ingredients can be used when there is no permissible alternative if there is a need to use the vaccine. 

Variables to Consider for an Infectious Disease and its Vaccine

In order to apply these principles to an infectious disease, it is necessary to establish that there is a necessity (ضرورة) to be immunized from it. Multiple variables need to be considered in order to establish this, such as:

  • Morbidity and Mortality

This data needs to be analyzed in order to understand the level of necessity (ضرورة)  for immunization from that infection.  The examples discussed earlier do not mention a specific number of people that need to be saved from death or illness, but rather stress the importance of preventing harm to a group of people.  In these examples, only a small group of people was threatened compared to the general population, such as in the case of a structure being removed if an unstable wall threatens people passing by, and this was still considered to be potential populational harm (ضرر عام).   In the case of infectious diseases, medical data needs to show that there is a significant impact on the morbidity and mortality of the population, such as serious illness requiring hospitalization or resulting in death.

  • Population-Specific Data

The level of risk to the general vs specific populations needs to be analyzed.  In some cases, the level of morbidity and mortality may not affect a significant proportion of the general population but may be higher in a subset of the population. An example would be the pneumococcal vaccine for adults, which is recommended for ages 65 and above and those with certain chronic medical conditions[24].  In these subsets of the population, there is a greater prevalence of and risk of complications from the infection compared to healthy adults under 65.  Therefore, the data may show that necessity (ضرورة)  for the vaccine is limited to a subset of the population. 

  • Effectiveness of the Vaccine

Data on the impact of the vaccine on reducing the morbidity and mortality of an infection needs to be analyzed.  In the examples we have discussed, an unlawful action can be allowed due to necessity only because it is expected to prevent a harm.  For this to apply to a vaccine, data needs to support that there is a significant decrease in the morbidity or mortality from the infection that is immunized against.

Example: Data for Routine Childhood Vaccinations

Routine childhood vaccination under the “Vaccines for Children” program began in 1993 and initially included vaccines for diphtheria, tetanus, pertussis, polio, Haemophilus influenzae type b disease, hepatitis B, measles, mumps, and rubella. Five additional vaccines were later added to the program: influenza, hepatitis A, varicella, pneumococcal disease, rotavirus.  The program provides cost-free vaccines to children in the United States who lack health insurance or are otherwise unable to pay for vaccines[25].  Data was analyzed for vaccines administered through this program, and as mentioned above, statistical models estimate that for children born between 1994 and 2013, 21 million hospitalizations and 732,000 deaths will be prevented during their lifetimes.  Data for each individual infection is presented in the table below, with cases measured in the thousands:

(Click image to enlarge. Table is reproduced from MMWR 2014 Apr;63(16):352-5.)

Applying the principles discussed earlier, we first need to establish that there is a necessity (ضرورة) for immunization from diseases for which vaccination with impermissible ingredients is being considered.  As stated above, this can be established by data on morbidity and mortality, both of which can be derived from the table above.  Serious illness requiring hospitalization and deaths represent morbidity and mortality from these infections that would be expected to occur (غلبة الظن) if the vaccine was not administered. 

We also need to establish that the vaccine is effective in removing the expected harm from the infection.   The data above can be used for this purpose as well, as it represents morbidity and mortality that is expected to be prevented by the use of each vaccine. 

We also need to determine if there is a need to use a form of a vaccine that has Islamically impermissible ingredients. This can be determined by analyzing the ingredients of each form that is available on the market and accessible to patients.  If a form of the vaccine with permissible ingredients is available, then there would be no need to use the one with impermissible ingredients.  For example, analysis of influenza vaccines for the 2019-2020  flu season found that permissible forms are available in the United States[26]. Therefore, impermissible forms cannot be used by Muslims unless an impermissible form is specifically required in individual circumstances. 

Some vaccines are only available in combination with others.  In that case, the combined data for the infections that are immunized against should be considered. 

Below are some examples of infections for which necessity (ضرورة) can be established based on the data presented. In each case, the data leads to an expectation (غلبة الظن) of significant populational harm (ضرر عام):

  1. Diphtheria, Tetanus, Pertussis: the vaccine for diphtheria is only available in combination with either tetanus or tetanus and pertussis for young children in the United States[27]. In combination, these infections are expected to cause approximately 7.8 million hospitalizations and 528,000 deaths if the vaccine is not given. 
  2. Measles, Mumps, Rubella: the vaccines for these infections are only available in combinations in the United States[28].  In combination, these 3 infections are expected to cause approximately 144 million hospitalizations and 58,000 deaths if the vaccine is not given. 
  3. Hepatitis B: this infection is expected to cause 623,000 hospitalizations and approximately 60,000 deaths if the vaccine is not given
  4. Pneumococcus-related diseases:  Infections in the form of pneumonia, otitis media and invasive disease are expected to cause approximately 900,000 hospitalizations and 55,000 deaths if the vaccine was not given

Once necessity (ضرورة) is established for immunization from these infections, then further investigation into the available forms of the vaccines for these infections can be done to determine if Muslims have permissible options, or if an impermissible form must be used, as discussed above.

Conditions for Applicability

For a vaccine that contains impermissible ingredients to be considered permissible to use, the following conditions must be met:

  1. Need for immunization from the infection– this can be established based on epidemiologic data on morbidity and mortality
  2. Definition of the Target Population: is the need for immunization established for the general population vs a subset of the population?
  3. Effectiveness of Vaccine: The vaccine needs to have a significant impact on the morbidity/mortality of the target population
  4. Lack of availability of a permissible alternative – if a form of a particular vaccine is produced and is accessible for the target population, then there would no longer be a necessity to use the impermissible form


This work is not meant to be a legal verdict (or fatwa) regarding the permissibility of any specific vaccine.  Rather, it provides a legal basis upon which a potential verdict can be given.  A verdict can be given for a particular vaccine based on analysis of medical data and based on recommendations of medical personal in consultation with Islamic scholars


Based on the principles of avoiding populational harm and of necessity permitting the unlawful, Muslims may receive necessary vaccines with impermissible ingredients when there is no alternative form with permissible ingredients. 

[1] CDC: Immunization: The Basics.

[2] CDC: Principles of Vaccination.

[3] Meissner HC. Why is herd immunity so important, AAP News. 2015;36:14


[5] Whitney CG, Zhou F, Singleton J, Schuchat A, Centers for Disease Control and Prevention (CDC). Benefits from immunization during the vaccines for children program era – United States, 1994-2013, MMWR 2014 Apr;63(16):352-5.

[6] States With Religious and Philosophical Exemptions From School Immunization Requirements,

[7] CDC: Vaccine Excipient Summary.

[8] الْأَشْبَاهُ وَالنَّظَائِرُ, دار الكتب العلمية   1:73

وَهَذِهِ الْقَاعِدَةُ مَعَ الَّتِي قَبْلَهَا مُتَّحِدَةٌ أَوْ مُتَدَاخِلَةٌ، وَتَتَعَلَّق بِهَا قَوَاعِدُ: الْأُولَى: الضَّرُورَاتُ تُبِيحُ الْمَحْظُورَاتِ،

وَمِنْ ثَمَّ جَازَ أَكْلُ الْمَيْتَةِ عِنْدَ الْمَخْمَصَةِ، وَإِسَاغَةُ اللُّقْمَةِ بِالْخَمْرِ، وَالتَّلَفُّظُ بِكَلِمَةِ الْكُفْرِ لِلْإِكْرَاهِ وَكَذَا إتْلَافُ الْمَالِ، وَأَخْذُ مَالِ الْمُمْتَنِعِ الْأَدَاءِ مِنْ الدَّيْنِ بِغَيْرِ إذْنِهِ وَدَفْعُ الصَّائِلِ، وَلَوْ أَدَّى إلَى قَتْلِهِ.

[9], دار الفكر القواعد الفقهية وتطبيقاتها في المذاهب الأربعة   1:97

والشك: هو التردد بين النقيضين بلا ترجيح لأحدهما على الآخر، أو هو التردد في وقوع الشيء وعدم وقوعه على السواء، وبينه وبين اليقين الظن، أو الظن الغالب.

وهو ترجيح أحد الطرفين على الآخر بدليل ظاهر يبني عليه العاقل أموره، لكن لم يطرح الاحتمال الآخر، ويقابل الظنَّ الوهمُ، وهو الجانب المرجوح لدليل أقوى منه، والفقهاء يريدون بالشك مطلق التردد سواء كان الطرفان سواء أو أحدهما راجحاً، وعلماء الأصول يفرقون بين الشك والظن.

[10] رد المحتار على الدر المختار, دار الفكر  2:422

[10] (قَوْلُهُ خَافَ الزِّيَادَةَ) أَوْ إبْطَاءَ الْبُرْءِ أَوْ فَسَادَ عُضْوٍ بِحَرٍّ أَوْ وَجَعَ الْعَيْنِ أَوْ جِرَاحَةً أَوْ صُدَاعًا أَوْ غَيْرَهُ، وَمِثْلُهُ مَا إذَا كَانَ يُمَرِّضُ الْمَرْضَى قُهُسْتَانِيٌ ط أَيْ بِأَنْ يَعُولَهُمْ وَيَلْزَمَ مِنْ صَوْمِهِ ضَيَاعُهُمْ وَهَلَاكُهُمْ لِضَعْفِهِ عَنْ الْقِيَامِ بِهِمْ إذَا صَامَ (قَوْلُهُ وَصَحِيحٍ خَافَ الْمَرَضَ) أَيْ بِغَلَبَةِ الظَّنِّ كَمَا يَأْتِي، فَمَا فِي شَرْحِ الْمَجْمَعِ مِنْ أَنَّهُ لَا يُفْطِرُ مَحْمُولٌ عَلَى أَنَّ الْمُرَادَ بِالْخَوْفِ مُجَرَّدُ الْوَهْمِ كَمَا فِي الْبَحْرِ وَالشُّرُنْبَلاليّ (قَوْلُهُ وَخَادِمَةٍ) فِي الْقُهُسْتَانِيِّ عَنْ الْخِزَانَةِ مَا نَصُّهُ إنَّ الْحُرَّ الْخَادِمَ أَوْ الْعَبْدَ أَوْ الذَّاهِبَ لِسَدِّ النَّهْرِ أَوْ كَرْيِهِ إذَا اشْتَدَّ الْحَرُّ وَخَافَ الْهَلَاكَ فَلَهُ الْإِفْطَارُ كَحُرَّةٍ أَوْ أَمَةٍ ضَعُفَتْ لِلطَّبْخِ أَوْ غَسْلِ الثَّوْبِ

[11]رد المحتار على الدر المختار, دار الفكر    1:233

(أَوْ لِمَرَضٍ) يَشْتَدُّ أَوْ يَمْتَدُّ بِغَلَبَةِ ظَنٍّ أَوْ قَوْلِ حَاذِقٍ مُسْلِمٍ وَلَوْ بِتَحَرُّكٍ

[12] درر الحكام شرح غرر الأحكام, دار إحياء الكتب العربية  1:109       

وَيَجُوزُ قَطْعُهَا بِسَرِقَةٍ مَا يُسَاوِي دِرْهَمًا وَلَوْ لِغَيْرِهِ وَخَوْفِ ذِئْبٍ عَلَى غَنَمٍ أَوْ خَوْفِ تَرَدِّي أَعْمَى فِي بِئْرٍ وَيَجِبُ قَطْعُهَا بِاسْتِغَاثَةِ مَلْهُوفٍ مَظْلُومٍ بِالْمُصَلِّي وَلَا يَجِبُ قَطْعُهَا بِنِدَاءِ أَحَدِ أَبَوَيْهِ اهـ قَالَ الْوَلْوَالِجِيُّ إلَّا أَنْ يَسْتَغِيثَ بِهِ أَيْ أَحَدُ أَبَوَيْهِ وَهَذَا فِي الْفَرْضِ فَأَمَّا فِي النَّفْلِ إذَا نَادَاهُ أَحَدُ أَبَوَيْهِ إنْ عَلِمَ أَنَّهُ فِي الصَّلَاةِ لَا بَأْسَ أَنْ لَا يُجِيبَهُ، وَإِنْ لَمْ يَعْلَمْ يُجِيبُهُ كَمَا فِي الْبَحْرِ اهـ.

[13] رد المحتار على الدر المختار, دار الفكر    2:52

مطلب قطع الصلاة يكون حراما ومباحا ومستحبا وواجبا.[تتمة] نقل عن خط صاحب البحر على هامشه أن القطع يكون حراما ومباحا ومستحبا وواجبا، فالحرام لغير عذر والمباح إذا خاف فوت مال، والمستحب القطع للإكمال، والواجب لإحياء نفس.

[14]  الْأَشْبَاهُ وَالنَّظَائِرُ, دار الكتب العلمية     1:75

تَنْبِيهٌ: يُتَحَمَّلُ الضَّرَرُ الْخَاصُّ؛ لِأَجْلِ دَفْعِ ضَرَرِ الْعَامِّ. وَهَذَا مُقَيِّدٌ لِقَوْلِهِمْ: الضَّرَرُ لَا يُزَالُ بِمِثْلِهِ

[15]  تبيين الحقائق شرح كنز الدقائق وبهامشه حاشية الشلبي, المطبعة الكبرى الأميرية   6:40

(قَوْلُهُ: وَالْفَاصِلُ بَيْنَ الْخَاصِّ وَالْعَامِّ إلَخْ) قَالَ الْأَتْقَانِيُّ وَجَعَلَ مُحَمَّدٌ الْحَدَّ الْفَاصِلَ بَيْنَ الْعَامِّ وَالْخَاصِّ اسْتِحْقَاقَ الشُّفْعَةِ فَقَالَ الْخَاصُّ مِنْ النَّهْرِ مَا لَوْ بِيعَتْ أَرْضٌ عَلَى هَذَا النَّهْرِ كَانَ لِجَمِيعِ أَهْلِ النَّهْرِ حَقُّ الشُّفْعَةِ فَيَحْتَاجُ إلَى أَنْ يَذْكُرَ الْحَدَّ الْفَاصِلَ بَيْنَ الشَّرِكَةِ الْعَامَّةِ وَالْخَاصَّةِ فِي الشُّفْعَةِ وَاخْتَلَفَ الْمَشَايِخُ فِي تَحْدِيدِ ذَلِكَ، وَلَكِنْ أَحْسَنُ مَا قِيلَ فِيهِ مِنْ التَّحْدِيدِ هُوَ أَنَّ الشُّرَكَاءَ فِي النَّهْرِ إنْ كَانُوا مَا دُونَ الْمِائَةِ فَالشَّرِكَةُ خَاصَّةٌ تُسْتَحَقُّ بِهَا الشُّفْعَةُ، وَإِنْ كَانُوا مِائَةً فَصَاعِدًا فَالشَّرِكَةُ عَامَّةٌ لَا تَجِبُ الشُّفْعَةُ لِلْكُلِّ، وَإِنَّمَا تَكُونُ لِلْجَارِ. اهـبَيْنَ الْخَاصِّ وَالْعَامِّ أَنَّ مَا تُسْتَحَقُّ بِهِ الشُّفْعَةُ خَاصٌّ، وَمَا لَا تُسْتَحَقُّ بِهِ عَامٌّ. وَوَجْهُ الْفَرْقِ بَيْنَهُمَا أَنَّ فِي الْعَامِّ دَفْعَ الضَّرَرِ الْعَامِّ، وَهُوَ ضَرَرُ بَقِيَّةِ الشُّرَكَاءِ، وَمِثْلُ هَذَا جَائِزٌ بِإِلْزَامِ الضَّرَرِ الْخَاصِّ بَلْ وَاجِبٌ إذَا تَعَيَّنَ مِدْفَعًا فَبِدُونِ الضَّرَرِ أَوْلَى؛ لِأَنَّ الْآبِيَ لَا يَلْحَقُهُ بِذَلِكَ ضَرَرٌ بَلْ يَحْصُلُ لَهُ نَفْعٌ بِمُقَابَلَتِهِ فَأَمْكَنَ إجْبَارُهُ عَلَيْهِ بِخِلَافِ مَا إذَا كَانَ خَاصًّا؛ لِأَنَّهُ لَيْسَ فِيهِ دَفْعُ ضَرَرٍ عَامٍّ، وَإِنَّمَا فِيهِ دَفْعُ ضَرَرٍ خَاصٍّ، وَهُوَ ضَرَرُ شُرَكَائِهِ فَلَا يَلْزَمُهُ الضَّرَرُ الْخَاصُّ لِدَفْعِ الضَّرَرِ الْخَاصِّ؛ لِأَنَّهُمَا اسْتَوَيَا، وَيُمْكِنُ دَفْعُ ضَرَرِ شُرَكَائِهَا بِدُونِ ذَلِكَ بِأَنْ يَرْجِعُوا عَلَيْهِ بِحِصَّتِهِ مِنْ الْمُؤْنَةِ إذَا كَانَ ذَلِكَ بِأَمْرِ الْقَاضِي بِخِلَافِ مَا إذَا كَانَ عَامًّا؛ لِأَنَّهُ لَا يُمْكِنُهُ الرُّجُوعُ عَلَيْهِمْ لِكَثْرَتِهِمْ وَرُبَّمَا لَا تُقْبَلُ الْمُؤْنَةُ الْقِسْمَةَ عَلَيْهِمْ، وَلَا يَدْرِي حِصَّةَ كُلِّ وَاحِدٍ مِنْهُمْ

[16]رد المحتار على الدر المختار, دار الفكر  2:422

ط (قَوْلُهُ بِغَلَبَةِ الظَّنِّ) تُنَازِعُهُ خَافَ الَّذِي فِي الْمَتْنِ وَخَافَ وَخَافَتْ اللَّتَانِ فِي الشَّرْحِ ط (قَوْلُهُ بِأَمَارَةٍ) أَيْ عَلَامَةٍ (قَوْلُهُ أَوْ تَجْرِبَةٍ) وَلَوْ كَانَتْ مِنْ غَيْرِ الْمَرِيضِ عِنْدَ اتِّحَادِ الْمَرَضِ ط عَنْ أَبِي السُّعُودِ (قَوْلُهُ حَاذِقٍ) أَيْ لَهُ مَعْرِفَةٌ تَامَّةٌ فِي الطِّبِّ، فَلَا يَجُوزُ تَقْلِيدُ مَنْ لَهُ أَدْنَى مَعْرِفَةٍ فِيهِ ط (قَوْلُهُ مُسْلِمٍ) أَمَّا الْكَافِرُ فَلَا يُعْتَمَدُ عَلَى قَوْلِهِ لِاحْتِمَالِ أَنَّ غَرَضَهُ إفْسَادُ الْعِبَادَةِ كَمُسْلِمٍ شَرَعَ فِي الصَّلَاةِ بِالتَّيَمُّمِ فَوَعَدَهُ بِإِعْطَاءِ الْمَاءِ فَإِنَّهُ لَا يَقْطَعُ الصَّلَاةَ لِمَا قُلْنَا بَحْرٌ (قَوْلُهُ مَسْتُورٍ) وَقِيلَ عَدَالَتُهُ شَرْطٌ وَجَزَمَ بِهِ الزَّيْلَعِيُّ وَظَاهِرُ مَا فِي الْبَحْرِ وَالنَّهْرِ ضَعْفُهُ ط.

[17]  المبسوط السرخسي, دار المعرفة  20:159

وَلَوْ أَنَّ نَهْرًا بَيْنَ قَوْمٍ فَاصْطَلَحُوا عَلَى كَرْيِهِ أَوْ بِوَضْعِ مَمْشَاةٍ أَوْ قَنْطَرَةٍ عَلَيْهِ عَلَى أَنْ يَكُونَ النَّفَقَةُ عَلَيْهِمْ بِحِصَصِهِمْ فَهَذَا جَائِزٌ كُلُّهُ عَلَيْهِمْ؛ لِأَنَّهُمْ يُجْبَرُونَ عَلَى ذَلِكَ لَوْ لَمْ يَصْطَلِحُوا إذَا كَانَ فِيهِ ضَرَرٌ عَامٌّ فَإِنَّ رَفْعَ الضَّرَرِ وَاجِبٌ فَإِذَا اصْطَلَحُوا كَانَ إلَى الْجَوَازِ أَقْرَبُ فَإِنْ كَانَ بِحَيْثُ لَا يَضُرُّهُمْ تَرْكُهَا فَفِي الْقَنْطَرَةِ وَالْمَمْشَاةِ لَا يُجْبَرُونَ عَلَى ذَلِكَ؛ لِأَنَّهُ تَدْبِيرٌ فِي الْمِلْكِ وَهُوَ مُفَوَّضٌ إلَى رَأْيِ الْمُلَّاكِ وَإِنَّمَا يُجْبَرُونَ عَلَى إزَالَةِ الضَّرَرِ الْعَامِّ فَمَا لَيْسَ فِيهِ ضَرَرٌ عَامٌّ لَا يُجْبَرُونَ عَلَيْهِ وَأَمَّا الْكَرْيُ فَإِنِّي أُجْبِرُ عَلَيْهِ؛ لِأَنَّ فِي تَرْكِهِ ضَرَرًا عَامًّا فَإِنَّ لِلنَّاسِ فِي النَّهْرِ حَقَّ السَّقْيِ فَيَتَضَرَّرُونَ بِانْقِطَاعِ ذَلِكَ عَنْهُمْ وَلَا يَصِلُ إلَيْهِمْ مِلْكُ الْمَنْفَعَةِ إلَّا بِالْكَرْيِ وَلِلْإِمَامِ أَنْ يُجْبِرَ الشُّرَكَاءَ فِيهِ عَلَى الْكَرْيِ وَتَمَامُ هَذَا فِي كِتَابِ الشِّرْبِ.

[18]  بدائع الصنائع في ترتيب الشرائع, دار الكتب العلمية  6:191

وَلَوْ زَادَ فِي عَرْضِهِ لَا يَجُوزُ؛ لِأَنَّ الْكُوَى مِنْ حُقُوقِ النَّهْرِ فَيَمْلِكُهُ بِمِلْكِ النَّهْرِ بِخِلَافِ الزِّيَادَةِ فِي الْعَرْضِ، وَلَوْ كَانَ نَهْرٌ يَأْخُذُ الْمَاءَ مِنْ النَّهْرِ الْأَعْظَمِ بَيْنَ قَوْمٍ فَخَافُوا أَنْ يَنْبَثِقَ فَأَرَادُوا أَنْ يُحَصِّنُوهُ فَامْتَنَعَ بَعْضُهُمْ عَنْ ذَلِكَ فَإِنْ كَانَ ضَرَرًا عَامًّا يُجْبَرُونَ عَلَى أَنْ يُحَصِّنُوهُ بِالْحِصَصِ، وَإِنْ لَمْ يَكُنْ فِيهِ ضَرَرٌ عَامٌّ لَا يُجْبَرُونَ عَلَيْهِ؛ لِأَنَّ الِانْتِفَاعَ مُتَعَذَّرٌ عِنْدَ عُمُومِ الضَّرَرِ، فَكَانَ الْجَبْرُ عَلَى التَّحْصِيصِ مِنْ بَابِ دَفْعِ الضَّرَرِ عَنْ الْجَمَاعَةِ فَجَازَ وَإِذَا لَمْ يَكُنْ الضَّرَرُ عَامًّا يُمْكِنُ الِانْتِفَاعُ بِالنَّهْرِ فَكَانَ الْجَبْرُ بِالتَّحْصِيصِ جَبْرًا عَلَيْهِ لِزِيَادَةِ الِانْتِفَاعِ بِالنَّهْرِ وَهَذَا لَا يَجُوزُ وَلَوْ كَانَ نَهْرٌ لِرَجُلٍ مُلَاصِقٌ لِأَرْضِ رَجُلٍ فَاخْتَلَفَ صَاحِبُ الْأَرْضِ وَالنَّهْرِ فِي مُسَنَّاةٍ فَالْمُسَنَّاةُ لِصَاحِبِ الْأَرْضِ عِنْدَ أَبِي حَنِيفَةَ – رَحِمَهُ اللَّهُ – لَهُ أَنْ يَغْرِسَ فِيهَا طِينَهُ وَلَكِنْ لَيْسَ لَهُ أَنْ يَهْدِمَهَا.

[19] الإختيار لتعليل المختار, مطبعة الحلبي  3:72

(وَمَا هُوَ مَمْلُوكٌ لِلْعَامَّةِ فَكَرْيُهُ عَلَى أَهْلِهِ) ؛ لِأَنَّ مَنْفَعَتَهُ لَهُمْ. (وَمَنْ أَبَى مِنْهُمْ يُجْبَرُ) دَفْعًا لِلضَّرَرِ الْعَامِّ، وَهُوَ ضَرَرُ الشُّرَكَاءِ بِالضَّرَرِ الْخَاصِّ، كَيْفَ وَفِيهِ مَنْفَعَتُهُ؟ فَلَا يُعَارِضُهُ.وَإِنْ كَانَ فِيهِ ضَرَرٌ عَامٌّ بِأَنْ خَافُوا أَنْ يَنْشَقَّ النَّهْرُ، فَيَخْرُجَ الْمَاءُ إِلَى طَرِيقِ الْمُسْلِمِينَ وَأَرَاضِيهِمْ – فَعَلَيْهِمْ تَحْصِينُهُ بِالْحِصَصِ. وَالنَّهْرُ الْمَمْلُوكُ لِجَمَاعَةٍ مَخْصُوصِينَ فَكَرْيُهُ عَلَيْهِمْ، وَمَنْ أَبَى مِنْهُمْ قِيلَ: يُجْبَرُ؛ لِمَا مَرَّ، وَقِيلَ: لَا يُجْبَرُ؛ لِأَنَّ كُلَّ وَاحِدٍ مِنَ الضَّرَرَيْنِ خَاصٌّ. وَيُمْكِنُ دَفْعُهُ بِالْكَرْيِ بِأَمْرِ الْقَاضِي، ثُمَّ يَرْجِعُ عَلَى الْآبِي، وَلَا كَذَلِكَ الْأَوَّلُ

[20]  الجوهرة النيرة على مختصر القدوريي, المطبعة الخيرية  1:242

(قَوْلُهُ: وَقَالَ أَبُو حَنِيفَةَ: لَا أَحْجُرُ عَلَى السَّفِيهِ إذَا كَانَ حُرًّا بَالِغًا عَاقِلًا) السَّفِيهُ خَفِيفُ الْعَقْلِ الْجَاهِلُ بِالْأُمُورِ الَّذِي لَا تَمْيِيزَ لَهُ الْعَامِلُ بِخِلَافِ مُوجَبِ الشَّرْعِ، وَإِنَّمَا لَمْ يُحْجَرْ عَلَيْهِ عِنْدَ أَبِي حَنِيفَةَ؛ لِأَنَّهُ مُخَاطَبٌ عَاقِلٌ وَلِأَنَّ فِي سَلْبِ وِلَايَتِهِ إهْدَارَ آدَمِيَّتِهِ، وَإِلْحَاقَهُ بِالْبَهَائِمِ وَذَلِكَ أَشَدُّ عَلَيْهِ مِنْ التَّبْذِيرِ فَلَا يُحْتَمَلُ الْأَعْلَى لِدَفْعِ الْأَدْنَى إلَّا أَنْ يَكُونَ فِي الْحَجْرِ عَلَيْهِ دَفْعُ ضَرَرٍ عَامٍّ كَالْحَجْرِ عَلَى الطَّبِيبِ الْجَاهِلِ، وَالْمُفْتِي الْمَاجِنِ، وَالْمُكَارِي الْمُفْلِسِ فَإِنَّ هَؤُلَاءِ يُحْجَرُ عَلَيْهِمْ فِيمَا يُرْوَى عَنْ أَبِي حَنِيفَةَ؛ إذْ هُوَ دَفْعُ الْأَعْلَى بِالْأَدْنَى، الْمُفْتِي الْمَاجِنُ هُوَ الَّذِي يُعَلِّمُ النَّاسَ حِيَلًا بَاطِلَةً كَارْتِدَادِ الْمَرْأَةِ لِتُفَارِقَ زَوْجَهَا، أَوْ الرَّجُلِ لِيُسْقِطَ الزَّكَاةَ وَلَا يُبَالِي أَنْ يُحَلِّلَ حَرَامًا، أَوْ يُحَرِّمَ حَلَالًا. وَالطَّبِيبُ الْجَاهِلُ هُوَ أَنْ يَسْقِيَ النَّاسَ دَوَاءً مُهْلِكًا. وَالْمُكَارِي الْمُفْلِسُ أَنْ يُكْرِيَ إبِلًا وَلَيْسَتْ لَهُ إبِلٌ وَلَا مَالٌ يَشْتَرِيهَا بِهِ، وَإِذَا جَاءَ أَوَانُ الْخُرُوجِ يُخْفِي نَفْسَهُ. قَوْلُهُ: (وَتَصَرُّفُهُ فِي مَالِهِ جَائِزٌ) لِأَنَّهُ مُخَاطَبٌ عَاقِلٌ لِقَوْلِهِ

[21]  الْأَشْبَاهُ وَالنَّظَائِرُ, دار الكتب العلمية  1:75

مِنْهَا: جَوَازُ الرَّمْيِ إلَى كُفَّارٍ تَتَرَّسُوا بِصِبْيَانِ الْمُسْلِمِينَ.

وَمِنْهَا: وُجُوبُ نَقْضِ حَائِطٍ مَمْلُوكٍ مَالَ إلَى طَرِيقِ الْعَامَّةِ عَلَى مَالِكِهَا؛ دَفْعًا لِلضَّرَرِ الْعَامِّ،

وَمِنْهَا: جَوَازُ الْحَجْرِ عَلَى الْبَالِغِ الْعَاقِلِ الْحُرِّ عِنْدَ أَبِي حَنِيفَةَ رَحِمَهُ اللَّهُ فِي ثَلَاثٍ: الْمُفْتِي الْمَاجِنِ، وَالطَّبِيبِ الْجَاهِلِ، وَالْمُكَارِي الْمُفْلِسِ؛ دَفْعًا لِلضَّرَرِ الْعَامِّ

وَمِنْهَا: جَوَازُهُ عَلَى السَّفِيهِ عِنْدَهُمَا وَعَلَيْهِ الْفَتْوَى، دَفْعًا لِلضَّرَرِ الْعَامِّ.

وَمِنْهَا: بَيْعُ مَالِ الْمَدْيُونِ الْمَحْبُوسِ عِنْدَهُمَا لِقَضَاءِ دَيْنِهِ، دَفْعًا لِلضَّرَرِ عَنْ الْغُرَمَاءِ وَهُوَ الْمُعْتَمَدُ

وَمِنْهَا: التَّسْعِيرُ عِنْدَ تَعَدِّي أَرْبَابِ الطَّعَامِ فِي بَيْعِهِ بِغَبْنٍ فَاحِشٍ.

وَمِنْهَا: بَيْعُ طَعَامِ الْمُحْتَكَرِ جَبْرًا عَلَيْهِ عِنْدَ الْحَاجَةِ وَامْتِنَاعِهِ مِنْ الْبَيْعِ، دَفْعًا لِلضَّرَرِ الْعَامِّ

[22] Ibid

[23] Ibid

[24] CDC. Use of 13-valent pneumococcal conjugate vaccine and 23-valent pneumococcal polysaccharide vaccine for adults with immunocompromising conditions: recommendations of the Advisory Committee on Immunization Practices (ACIP), MMWR Morb Mortal Wkly Rep. 2012;61(40):816.

[25] Vaccines for Children Program (VFC),

[26] Shaykh Mateen Khand, MD and Ramzan Judge, PharmD. Islamically Permissible Influenza Vaccines Available in the US for 2019-2020 Season,


[28] CDC: Vaccine Excipient Summary.

Islamically Permissible Influenza Vaccines Available in the US for 2019-2020 Season

Prepared by Shaykh Mateen A. Khan, MD and Dr. Ramzan Judge, PharmD


Permissible influenza vaccines in the US for 2019-2020 season:

  • Fluad™
  • Fluzone High-Dose™
  • Afluria™
  • Fluarix™
  • FluLaval™
  • Fluzone™ Quadrivalent

Impermissible influenza vaccines in the US for 2019-2020 season:

  • Flublok™
  • FluMist™
  • Flucelvax™


Background on Influenza

Influenza (commonly known as the flu) is a seasonal viral illness carrying significant health, economic, and social burden. For the past nine years, the Centers for Disease Control and Prevention (CDC) estimates that every year 9.3-49 million symptomatic illnesses, 4.3-23 million medical visits, 140,000-960,000 hospitalizations, and 12,000-79,000 deaths are attributed to seasonal influenza. For the 2017-2018 season, which was considered high severity, a study estimated influenza vaccination prevented:

  • 7.1 million illnesses
  • 3.7 million medical visits
  • 109,000 hospitalizations (10% of expected overall and 41% among young children)
  • 8,000 deaths1

In addition to providing immunity to healthy individuals, the vaccine benefits the sick by decreasing the amount of exposure from other individuals (herd immunity). Hence, the CDC, along with most American medical organizations, recommends that every person above six months old receive a seasonal influenza vaccine yearly.2

Improving vaccination rates among Muslims has been a struggle. Muslim majority countries find their populations hesitant.3 Similar issues are faced among Muslim minority populations in the West over a concern for the presence of impermissible ingredients in the vaccine.4

The United States currently offers nine different commercially prepared vaccines. We reviewed package inserts and public records for the vaccines to evaluate methods of production and the presence of impermissible products. When necessary, we corresponded with the manufacturers. The results are compiled in Table 1. The vaccines vary in their methods of production and ingredients, which may pose religious challenges for Muslims.

Challenge #1 – Methods of Production

Influenza vaccines are prepared through three different processes. Most strains are prepared through an egg-based manufacturing process. This involves injecting vaccine viruses into fertilized chicken eggs. Essentially, the egg is commandeered as a factory by the viruses as they use the egg’s resources to replicate themselves. The viruses are extracted and purified.5 Islamically, this process per se is not an issue as eggs are considered permissible.

Flucelvax™, a product by Seqirus, is made by incubating influenza viruses in a particular animal cell line, Madin-Darby Canine Kidney (MDCK).6 The MDCK cell line was initially isolated in 1958 from an adult Cocker Spaniel dog.7 Dogs, like all predators, are ḥarām as Sayyidunā Ibn `Abbās (may Allah be pleased with him) narrated that Allah’s Messenger ﷺ prohibited every predator possessing canine teeth.8 Further, when cells like MDCK are removed from an animal, they are considered maytah (carrion) in Islamic terminology. The Prophet ﷺ informed us, “Whatever is cut from an animal while it is alive is carrion.”9 Surah al-An`ām states a ruling of najis and ḥarām for carrion.

“Say, “I do not find, in what has been revealed to me, anything prohibited for anyone who eats it, unless it be carrion or blood that pours forth, or flesh of swine – because it is impure.”10

Hence, the initially harvested canine cells were najis and ḥarām. Since 1958, the cell line has undergone countless replication cycles in artificial environments, and the parent cells have long died off. Still, being the progeny cells, they will be impure and impermissible.

The MDCK cells used in Flucelvax™ are grown in a medium in which no human or animal-derived materials are used.11 After an incubation period, the cells are processed through lysis, and the virus proteins undergo extraction and purification. Despite this, residual amounts of the cells capable of inducing allergic reaction in susceptible patients remain, per the package insert. For these reasons, Flucelvax™ vaccine made from this method is impermissible.

Flublok™ manufactured by Sanofi, is produced by genetically engineering proteins expressed by influenza into an alternate virus, baculovirus (Autographa californica). It is then used to infect an insect cell line (ExpresSF+) derived from the fall armyworm (Spodoptera frugiperda), which produces the desired influenza proteins. This vaccine is especially valuable to those who have allergies to eggs.12 Many insects, like the armyworm, fall into the category of al-khabā’ith explicitly mentioned in the Qur’an as ḥarām in Surah al-A`rāf.

[He ﷺ] makes unlawful for them impure things (al-khabā’ith).13

Similar to animal cell lines discussed previously, the progeny ExpresSF+ cells are impure and impermissible. Hence, Flublok™ vaccine made from this method is also impermissible.

Issue #2 – Porcine Gelatin as a Stabilizer

Two of the vaccines available in the United States, FluMist™ and Flucelvax™, contain porcine gelatin. The gelatin is added as a stabilizer for the viral vaccine protein. Gelatin is hydrolyzed collagen, which is extracted from collagen-containing tissue like skin and bones. At the outset, the Qur’an declares that all porcine parts are najis and ḥarām.

Say, “I do not find, in what has been revealed to me, anything (out of the cattle under discussion) prohibited for anyone who eats it, unless it be carrion or blood that pours forth, or flesh of swine – because it is impure – or there be an animal slaughtered sinfully by invoking on it the name of someone other than Allah. (Surah al-An`ām:145)14

He has but prohibited for you the carrion, the blood, the flesh of swine and what has been invoked upon with a name other than that of Allah. (Surah al-Naḥl:115)15

In earlier times, gelatin was prepared in homes through a process of cooking, causing the collagen to hydrolyze and break into peptides of varying lengths. Although the process today is commercialized and done through a series of chemical reactions, extraction, and purification, the result is not much different from home preparations. These peptides do not constitute a significant change from the original porcine collagen. Instead, gelatin is just fragmented hydrolyzed collagen. The resulting gelatin is impermissible.16 Hence, FluMist™ and Flucelvax™ are impermissible particularly when other permissible alternatives exist.

Exceptional Cases

If someone is unable to take one of the permissible vaccines (e.g., an egg allergy), but they are relatively healthy, they should not take an impermissible vaccine. However, if a strong need exists, then they may take those vaccines that are normally impermissible. An example of a strong medical need is when there is a high likelihood (ghalabah al-ẓann) of significant morbidity or mortality in contracting influenza such as in the very old or patients with pre-existing significant comorbidities. Ideally, the Sharī`ah prefers a competent Muslim physician to determine this need based upon the evidences at hand. The physician should be pious and have a basic understanding of the relevant Sharī`ah rulings.17 Vaccinations mandated by the government, work places, or schools may also constitute a strong need.18 In any of these situations, one may take (in order of preference) Flublok™, FluMist™, and Flucelvax™.


Of the nine commercially available influenza vaccines available in the US for the 2019-2020 season, six are Islamically permissible: Fluad™, Fluzone High-Dose™, Afluria™, Fluarix™, FluLaval™, and Fluzone™ Quadrivalent. The Muslim public is advised to avoid Flublok™, FluMist™, and Flucelvax™.

In exceptional cases, as outlined above, one may take Flublok™, FluMist™, and Flucelvax™ in that order.

Of note, vaccine formulations are subject to change year to year. The research presented here is accurate for the 2019-2020 season.


We request Allah ta`āla to send special blessings on Mufti Faisal al-Mahmudi for his invaluable assistance.

Table 1: 2019-2020 Influenza Vaccines

Rolfes, M.A. (2019). Effects of Influenza Vaccination in the United States During the 2017–2018 Influenza Season. Clinical Infectious Diseases, ciz075,

Ahmed, A. (2018) Outbreak of vaccine-preventable diseases in Muslim majority countries. Journal of Infection and Public Health, 11 (2), 153-155.,for%20more%20than%2070%20years.&targetText=For%20flu%20shots%2C%20the%20influenza,and%20virus%20antigen%20is%20purified.,as%20responses%20to%20growth%20factors.

عَنِ ابْنِ عَبَّاسٍ، قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم عَنْ كُلِّ ذِي نَابٍ مِنَ السِّبَاعِ (مسلم 1934)

مَا قُطِعَ مِنَ الْبَهِيمَةِ وَهِيَ حَيَّةٌ فَهِيَ مَيْتَةٌ (أبو داوود 2858، الترمذي 1480، ابن ماجه 3216)
وَعَلَى هَذَا يَخْرُجُ مَا إذَا قَطَعَ مِنْ أَلْيَةِ الشَّاةِ قِطْعَةً أَوْ مِنْ فَخِذِهَا أَنَّهُ لَا يَحِلُّ الْمُبَانُ وَإِنْ ذُبِحَتْ الشَّاةُ بَعْدَ ذَلِكَ؛ لِأَنَّ حُكْمَ الذَّكَاةِ لَمْ يَثْبُتْ فِي الْجُزْءِ الْمُبَانِ وَقْتَ الْإِبَانَةِ لِانْعِدَامِ ذَكَاةِ الشَّاةِ لِكَوْنِهَا حَيَّةً وَقْتَ الْإِبَانَةِ، وَحَالَ فَوَاتِ الْحَيَاةِ كَانَ الْجُزْءُ مُنْفَصِلًا وَحُكْمُ الذَّكَاةِ لَا يَظْهَرُ فِي الْجُزْءِ الْمُنْفَصِلِ وَرُوِيَ أَنَّ أَهْلَ الْجَاهِلِيَّةِ كَانُوا يَقْطَعُونَ قِطْعَةً مِنْ أَلْيَةِ الشَّاةِ وَمِنْ سَنَامِ الْبَعِيرِ فَيَأْكُلُونَهَا فَلَمَّا بُعِثَ النَّبِيُّ الْمُكَرَّمُ – عَلَيْهِ الصَّلَاةُ وَالسَّلَامُ – نَهَاهُمْ عَنْ ذَلِكَ فَقَالَ – عَلَيْهِ الصَّلَاةُ وَالسَّلَامُ – «مَا أُبِينَ مِنْ الْحَيِّ فَهُوَ مَيِّتٌ» وَالْجُزْءُ الْمَقْطُوعُ مُبَانٌ مِنْ حَيٍّ وَبَائِنٌ مِنْهُ فَيَكُونُ مَيِّتًا وَكَذَلِكَ إذَا قُطِعَ ذَلِكَ مِنْ صَيْدٍ لَمْ يُؤْكَلْ الْمَقْطُوعُ، وَإِنْ مَاتَ الصَّيْدُ بَعْدَ ذَلِكَ لِمَا قُلْنَا. (بدائع الصنائع في ترتيب الشرائع)

10 عَ قُل لَّا أَجِدُ فِي مَا أُوحِيَ إِلَيَّ مُحَرَّمًا عَلَىٰ طَاعِمٍ يَطْعَمُهُ إِلَّا أَن يَكُونَ مَيْتَةً أَوْ دَمًا مَّسْفُوحًا أَوْ لَحْمَ خِنزِيرٍ فَإِنَّهُ رِجْسٌ أَوْ فِسْقًا أُهِلَّ لِغَيْرِ اللَّـهِ بِهِ

11 European Medicines Agency Assessment Report on Flucelvax Tetra. 18 Oct. 2018. Pg. 14.

12 Barr, I. G. (2018). Cell culture-derived influenza vaccines in the severe 2017-2018 epidemic season: a step towards improved influenza vaccine effectiveness. NPJ vaccines, 3, 44. doi:10.1038/s41541-018-0079-z

13 وَيُحَرِّمُ عَلَيْهِمُ الْخَبَائِثَ
(وَأَمَّا) الَّذِي يَعِيشُ فِي الْبَرِّ فَأَنْوَاعٌ ثَلَاثَةٌ: مَا لَيْسَ لَهُ دَمٌ أَصْلًا، وَمَا لَيْسَ لَهُ دَمٌ سَائِلٌ، وَمَا لَهُ دَمٌ سَائِلٌ مِثْلُ الْجَرَادِ وَالزُّنْبُورِ وَالذُّبَابِ وَالْعَنْكَبُوتِ وَالْعَضَّابَةِ وَالْخُنْفُسَاءِ وَالْبُغَاثَةِ وَالْعَقْرَبِ.
وَنَحْوِهَا لَا يَحِلُّ أَكْلُهُ إلَّا الْجَرَادَ خَاصَّةً؛ لِأَنَّهَا مِنْ الْخَبَائِثِ لِاسْتِبْعَادِ الطِّبَاعِ السَّلِيمَةِ إيَّاهَا وَقَدْ قَالَ اللَّهُ تَبَارَكَ وَتَعَالَى {وَيُحَرِّمُ عَلَيْهِمُ الْخَبَائِثَ} [الأعراف: 157] إلَّا أَنَّ الْجَرَادَ خُصَّ مِنْ هَذِهِ الْجُمْلَةِ بِقَوْلِهِ – عَلَيْهِ الصَّلَاةُ وَالسَّلَامُ – «أُحِلَّتْ لَنَا مَيْتَتَانِ» فَبَقِيَ عَلَى ظَاهِرِ الْعُمُومِ. وَكَذَلِكَ مَا لَيْسَ لَهُ دَمٌ سَائِلٌ مِثْلُ الْحَيَّةِ وَالْوَزَغِ وَسَامِّ أَبْرَصَ وَجَمِيعِ الْحَشَرَاتِ وَهَوَامِّ الْأَرْضِ مِنْ الْفَأْرِ وَالْقُرَادِ وَالْقَنَافِذِ وَالضَّبِّ وَالْيَرْبُوعِ وَابْنِ عِرْسٍ وَنَحْوِهَا، وَلَا خِلَافَ فِي حُرْمَةِ هَذِهِ الْأَشْيَاءِ إلَّا فِي الضَّبِّ (بدائع الصنائع في ترتيب الشرائع)

14 قُل لَّا أَجِدُ فِي مَا أُوحِيَ إِلَيَّ مُحَرَّمًا عَلَىٰ طَاعِمٍ يَطْعَمُهُ إِلَّا أَن يَكُونَ مَيْتَةً أَوْ دَمًا مَّسْفُوحًا أَوْ لَحْمَ خِنزِيرٍ فَإِنَّهُ رِجْسٌ أَوْ فِسْقًا أُهِلَّ لِغَيْرِ اللَّـهِ بِهِ

15 إِنَّمَا حَرَّمَ عَلَيْكُمُ الْمَيْتَةَ وَالدَّمَ وَلَحْمَ الْخِنزِيرِ وَمَا أُهِلَّ لِغَيْرِ اللَّـهِ بِهِ

16 Respectfully, the minority opinion considering gelatin to have undergone a significant transformation (tabdīl al-mahiyah) rendering its ruling changed seems doubtful for the reasons outlined. This is an extensive discussion. However, with the availability of clearly ḥalāl alternatives, the opinion given in this article is more cautious.

17 وَجَوَّزَهُ فِي النِّهَايَةِ بِمُحَرَّمٍ إذَا أَخْبَرَهُ طَبِيبٌ مُسْلِمٌ أَنَّ فِيهِ شِفَاءً وَلَمْ يَجِدْ مُبَاحًا يَقُومُ مَقَامَهُ. قُلْت: وَفِي الْبَزَّازِيَّةِ وَمَعْنَى قَوْلِهِ – عَلَيْهِ الصَّلَاةُ وَالسَّلَامُ – «إنَّ اللَّهَ لَمْ يَجْعَلْ شِفَاءَكُمْ فِيمَا حُرِّمَ عَلَيْكُمْ» نَفْيُ الْحُرْمَةِ عِنْدَ الْعِلْمِ بِالشِّفَاءِ دَلَّ عَلَيْهِ جَوَازُ شُرْبِهِ لِإِزَالَةِ الْعَطَشِ (رد المحتار على الدر المختار)

18 Imdād al-Fatāwa Jadīd ma`a Hāshiyah Shabbīr Aḥmad al-Qāsimī, 9:262