Influenza (flu) is a viral infection affecting the lungs and airways. The symptoms can appear very quickly and include:
- sore throat
- aching muscles
Complications include bacterial pneumonia, and can be life threatening especially in:
- older people
- those with certain underlying health conditions
It occurs most often in winter in the UK and peaks between January and March.
There are 2 types of influenza affecting people:
- influenza A
- influenza B
Influenza B usually causes a milder illness and is most seen in children.
Flu vaccination is safe and effective. It’s offered every year through the NHS to help protect people at risk of getting seriously ill from flu.