Uses : Influenza vaccine is used to prevent seasonal flu.
How it works : Influenza vaccine is a vaccine.It helps develop immunity by initiating a mild infection. This type of infection does not cause illness, but it does stimulate the body's immune system to produce antibodies to protect against any future infections.
Common side effects : Flushing (sense of warmth in the face, ears, neck and trunk), Gastrointestinal disturbance, Decreased white blood cell count.