"The flu vaccine causes the flu." Either you believe this yourself or you know someone who does. The sad thing is, it’s a myth. It is simply not true. The viruses in the flu shot are killed and in the nasal spray vaccine the virus is weakened so that neither one can cause the flu. What I have seen happen often is that someone will catch a cold and conclude that the vaccine was the culprit. Some people may catch the flu shortly after they're vaccinated, not because of the vaccine, Continue Reading