As recently demonstrated by the “swine flu” which is a type of Influenza A, the flu virus is very good at mutating. Every year, the flu virus that appears during the winter months is different from the one that was here the previous year. Medical scientists usually go to Asia to see what type of virus is causing people to be ill and then make their “best guess” at a vaccine. This usually turns out to be very good. And, more often than not, the vaccine protects against the flu. Please make sure you get this vaccine yearly as over 30,000 people die from flu yearly in our country.