Flu can be very serious and having a flu vaccine every year is one of the best ways to protect against flu.
It is caused by a virus which is spread by coughs and sneezes. Symptoms of flu can be mild but can also lead to more serious illnesses such as bronchitis and pneumonia, which may need treatment in hospital.
If any of the following apply to you, even if you feel healthy, you are more likely to get complications from flu if you catch it, and you are advised to have a flu vaccine if:
The following groups are also advised to have a flu vaccine to protect them and the people around them:
You can find out more about the flu vaccination by visiting Public Health Wales (opens in a new tab).