Vaccines we not invented to stop the plague, @reddust please review the history. It may be true that there was not a robust understanding of vaccines initially, but if you say we do not have that knowledge now you are deceiving yourself. The government does not manufacture the vaccines, that is just incorrect. Vaccines are safer than getting in your automobile and driving on the highway. Why do you argue against proven protective results ? I doubt you've ever had to see someone stricken with polio and paralyzed, or someone who lost their hearing to measles. We do not have to deal with these issues as much thanks to vaccines.