The majority of vaccines are safe for some people. However, the body's immune response to vaccines are different from person to person. The immune response is how your body recognizes and defend itself against invading bacteria, viruses, and antigens (vaccines). Some immune response will respond normally to vaccines but some will overreact. Susceptible individuals are the ones with an overactive immune response and they will react differently to vaccines. The most common denominator in overactive immune response is overactive inflammation and neuroinflammation ( brain inflammation). Vaccines --> overactive immune response --> neuroinflammation --> neuronal loss (neurons die) --> autism symptoms. It's rare but playing Russian roulette in children is not an option. We need the CDC to do a study comparing the autism rates of vaccinated vs. non-vaccinated children. We have the control groups to do this now with over 1,000,000 verifiable vaccine exemptions. This would end the debate. We could finally see if vaccines are or are not the cause. The problem is that the CDC has been asked for years to do this study, but to date refuse. We deserve an answer for the safety of our children!