When it comes to the history of vaccines, it's been a long, bumpy ride. Once hailed as lifesaving wonders of modern technology, vaccines are now more likely to be a source of suspicion and angry playground debate.
Will we ever agree on the risk and benefits of vaccines? Probably not.
But to sort out fact from fiction, Health.com took a look at the scientific research to date on vaccines.
Former New York Yankees left-hander Fritz Peterson died at the age of 82. He is probably best known exchanging wives with teammate Mike Kekich in the 1970s.