Fasting is a common and essential aspect of religious beliefs and practices, with weekly and festal fasts that include abstinence from animal meat. But, can someone get enough protein when fasting from meat?

Are there animal products in vaccines? This question is common, particularly related to concerns of gelatin and eggs, but there might be other animal products hidden in vaccines.

Questions on the use of aborted fetal cells re-emerged when COVID-19 vaccines were introduced, especially with those wanting to make informed immunization decisions that aligned with their religious beliefs.