Although gelatin can be derived from many animals, Jewish and Islamic scholars have determined that since the gelatin is cooked and not consumed as food, vaccinations containing gelatin are acceptable. However, in 2015 and again in 2020, the possible use of porcine-based gelatin in vaccines raised religious concerns among Muslims and Orthodox Jews about the halal or kosher status of several vaccinations against COVID-19. The Muslim Council of Britain argued against the use of intranasal influenza vaccine in 2019 due to the presence of gelatin in the vaccine and consider such vaccines to be non-halal (unclean).
