Which religion is most likely to refuse a blood transfusion?

Jehovah's Witnesses are well-known for their refusal to accept blood transfusions based on their religious beliefs. This stance is rooted in their interpretation of certain biblical passages, particularly Acts 15:28-29, which they believe instructs them to abstain from blood. As a result, members of this faith are often advised to seek alternative medical treatments and refuse blood products, even in life-threatening situations, to adhere to their beliefs about the sanctity of blood and its role in their faith.

In contrast, while some other religions may have specific guidelines regarding medical treatments or blood, they do not categorically refuse blood transfusions. For example, Catholicism does not have a doctrine against blood products, and members are generally free to make personal medical decisions. Similarly, Islam and Judaism also do not have inherent prohibitions against blood transfusions, allowing for individual choice in medical situations. Therefore, the unique stance of Jehovah's Witnesses makes them the most clear example of a religious group that actively refuses blood transfusions.