You do realize there are numerous variants of influenza. For the most part, the vaccine is limited to those of the highest level of exposure (infection rate).

You do realize there are numerous variants of influenza. For the most part, the vaccine is limited to those of the highest level of exposure (infection rate). http://www.cdc.gov/flu/protect/keyfacts.htm http://www.cdc.gov/flu/protect/keyfacts.htm "The seasonal flu vaccine protects against three influenza viruses that research indicates will be most common during the upcoming season. Three kinds of influenza viruses commonly circulate among people today: influenza B viruses, influenza A (H1N1) viruses, and influenza A (H3N2) viruses. Each year, one flu virus of each kind is used to produce seasonal influenza vaccine." Why run the risk of endangering yourself or others of infection?