Description
Influenza vaccines, also known as flu shots, are vaccines that protect against influenza. A new version of the vaccine is developed twice a year as the influenza virus rapidly changes. Most provide modest to high protection against influenza; however, each year this varies. Evidence in adults over 65 years old is poor. They decrease the number of missed days of work by a half day on average. Vaccinating children may protect those around them.


Description
Influenza vaccines, also known as flu shots, are vaccines that protect against influenza. A new version of the vaccine is developed twice a year as the influenza virus rapidly changes. Most provide modest to high protection against influenza; however, each year this varies. Evidence in adults over 65 years old is poor. They decrease the number of missed days of work by a half day on average. Vaccinating children may protect those around them.