ce the vaccination was introduced. For more details see here.Q: How can we be sure that the vaccines we give are safe?A: Vaccine safety and effectiveness is continuously studied. Vaccines are designed to be given routinely when a child is well, so they must be extraordinarily safe. Safety testing begins as soon as a new vaccine is contemplated, continues until it is approved for use, and is monitored indefinitely once in general use. For more details see here. Q: Do vaccines cause autism?A: No, vaccines do not cause autism. For more details see here.