Factsheet: Do Vaccines Overwhelm the Immune System?
Factsheet: Do Vaccines Overwhelm the Immune System?
The Children's Hospital of Philadelphia (CHOP)
Factsheet explains what an antigen is and dispels the myth that vaccines overwhelm the immune system. Antigens are the parts of viruses and bacteria that induce immune responses, and introducing antigens in a vaccine can protect people is they are exposed to the virus or bacteria in the future. The factsheet notes that the number of antigens in routine childhood vaccines has decreased over time.