As to the question of why we all believe that vaccines are 100% safe ... we don't. We recognize that in rare situations a child might have an adverse reaction, but we weigh the odds of serious health problems arising from that against the odds of serious health problems arising from getting the contagious disease that the vaccine is meant to protect against, and we choose to go with the better odds. EVERYTHING in life is a game of odds; learning to realistically assess risk factors is a huge part of becoming an adult. I'm a grownup, and I've learned to properly assess risk. I hate needles with the white-hot heat of a thousand suns, but I'm vaccinated against what I can be (I happen to be allergic to measles vaccine), and my kids are also fully vaccinated. And I'll add another little anecdote: I got most of my vaccines at my public elementary school, along with EVERY OTHER CHILD IN MY CLASS. The County Health Department brought in a doctor and five nurses, each armed with a jet injector gun, and they lined us up at age 6 and had us march right into the line of fire. Took about an hour to vaccinate over 100 of us. Our parents were not charged for the service, but neither were they informed until after the fact; they sent us home with a note describing what to watch for in terms of complications. The World Didn't End, and the commies didn't win, either.