Why are flue vaccines given each year?

The influenza virus is constantly changing, with new strains emerging all the time. The flu vaccine is reformulated each year to protect against the most recent strains of the virus.

Here are some of the reasons why flu vaccines are given each year:

* The flu virus can cause serious illness. The flu can cause a range of symptoms, from mild fever and body aches to more serious complications, such as pneumonia, bronchitis, and hospitalization. In some cases, the flu can even be fatal.

* Flu vaccines are effective. Flu vaccines are effective at preventing the flu or reducing the severity of symptoms. Studies have shown that flu vaccines can reduce the risk of getting the flu by up to 50% and the risk of hospitalization by up to 75%.

* Flu vaccines are safe. Flu vaccines are safe for most people. Side effects are usually mild and go away on their own.