Flu Vaccine
The "flu shot" is either an inactivated vaccine (containing killed virus) that is given with a needle or a live, attenuated vaccine administered as a spray mist in the nostrils. The type of flu shot an individual can receive is based on his/her age and medical condition. The flu shot is approved for use in people older than 6 months, including healthy people and people with chronic medical conditions. About two weeks after vaccination, antibodies that provide protection against influenza virus infection develop in the body.
When to Get Vaccinated
October or November is the best time to get vaccinated, but you can still get vaccinated in the months of December, January, and later. Flu season can begin as early as October and last as late as May.
Gastro-intestinal symptoms, such as nausea, vomiting, and diarrhea, are much more common among children than adults.
Some of the complications caused by flu include bacterial pneumonia, dehydration, and worsening of chronic medical conditions, such as congestive heart failure, asthma, or diabetes. Children may get sinus problems and ear infections.
How Flu Spreads
The flu spreads in respiratory droplets caused by coughing and sneezing. It usually spreads from person to person, though occasionally a person may become infected by touching something with virus on it and then touching their mouth or nose.
Adults may be able to infect others beginning 1 day before getting symptoms and up to 7 days after getting sick. That means that you can give someone the flu before you know you’re sick as well as while you are sick.
For More Information About the Flu
and Flu Vaccine
U.S. Department of Health and Human Services, Centers for Disease Control and Prevention
California Department of Health Services