How do vaccines cause immunity in people and why doesn’t it always work?
Presented by: Dr. Weiping Cao and Dr. Zachary EndeWhen germs (e.g., bacteria or viruses) invade the body, they cause illness. Vaccines can prevent this from happening. Vaccines can be made from attenuated or inactivated germs or part of the germ structures, which help develop immunity by imitating an infection without causing disease. Once the imitation…