#9 Myth: Vaccines will 100% guarantee you won’t get sick
Vaccines aren’t 100% effective, but they can be pretty close to that number. The childhood vaccines on the CDC’s recommended schedule will keep safe more than 95% of kids who are vaccinated, Dr. Fisher says. For the 1 to 5 percent who doesn’t develop immunity, a second dose will actually boost the protection to almost 100 percent, she says.
If there’s a chicken pox problem in your kid’s school, a doctor can test the antibody response to look into the slight chance it didn’t work. Many health experts rely on herd immunity to boost protection too. That means that the more people who are vaccinated in the community, the less likely a germ can circulate and make people sick (both vaccinated and unvaccinated).