The flu is an upper respiratory illness that affects the nose, throat, and lungs. The flu can potentially develop into secondary infections or other serious complications.
The flu can be more severe in certain people, such as:
- anyone aged 65 and over
- pregnant women
- children and adults with an underlying health condition (such as long-term heart or respiratory disease)
- children and adults with weakened immune systems
Anyone in these risk groups is more likely to develop potentially serious complications such as pneumonia so it’s recommended that they have a flu vaccine every year to protect them.