Flu vaccination
Flu season begins in November and lasts through April, most cases occurs between end of December and beginning of March. Vaccine is usually offered in September till mid-November, but may also be given at any other time of the year.
Vaccination before the flu season gives an organism the chance to build up immunity, or protection from, the virus. The earlier you will done, the better. However, some doctors recommend to get protection even when there are only 2 or 3 months left in the flu season.
In the USA exists the Centers for Disease Control and Prevention (CDC) which often recommends that certain high-risk groups would be given priority when supplies of the flu vaccine are limited.
Another option is the nasal mist vaccine, which came on the market in 2003 and is now approved for use from 5 to 49 years. But this option is not good for everyone and can’t be used among the kids and adults from high-risk groups.