The flu season is from November to April, with most cases occurring between late December and early March.

Getting the shot before the flu season gives the body a chance to build up immunity to the virus. Although you can get a flu shot well into flu season, it’s best to try to get it earlier rather than later. However, even when there are only two or three months left in the flu season, it’s still a good idea to get protection if the vaccine is available in your area.

A non-shot option, the nasal mist vaccine, is now available, but because it contains weakened live flu viruses it is not for people with weakened immune systems or certain health conditions. The nasal mist vaccine is only for healthy, non-pregnant people between the ages of 2 and 49 years. Check with your doctor to see if your child can — or should — get this type of flu vaccine.

- excerpt from kidshealth.org -