The seasonal flu vaccine (flu jab) protects against several strains of flu virus. These are the strains most likely to be circulating this flu season.
You need to get a new vaccine each year. This is because the strains of the virus change. This is why it is called seasonal flu. But people commonly call it flu.
The flu vaccine is a safe and effective vaccine. It's offered every year to help protect people at risk of flu and its complications. The flu vaccine is safe to take during pregnancy.
How to get the flu vaccine
The best time to have the flu vaccine is in the autumn before flu starts spreading. But you can get the vaccine later.
Content supplied by the NHS and adapted for Ireland by the HSE