As summer turns to fall, it's time to focus on the flu again. The CDC has updated their recommendations for the 2012-2013 flu season.

Because the flu shot is the first step in protection against this seasonal sickness, the CDC recommends that everyone six months and older get a flu vaccine each year. The annual shot is a must because the flu viruses are constantly changing and the vaccine is formulated a little differently each year to keep up.

It can take up to two weeks for the flu vaccine to take effect, so it's best get your flu shot as soon as it's available in your area.

Influenza season is often unpredictable and can begin as early as October. If you don't have a regular family doctor, you can find the flu vaccine at your neighborhood drug store, health clinic and even at some schools.