Flu is caused by the influenza virus. The virus enters the body through the nose and mouth. From there it is transmitted to the throat and upper airways where it rapidly reproduces and goes on to cause the symptoms of flu. Children can catch and spread flu easily.
Flu can be a very unpleasant illness for children. It can lead to painful ear infections and serious problems, such as bronchitis and pneumonia.
Children with long-term health conditions, such as diabetes or heart problems, are at higher risk from flu. It's important they're vaccinated.
Vaccinating your child also protects others who are vulnerable to flu, such as babies and older people. People at risk from flu are also vulnerable to the complications of COVID-19.
What is flu? Animation for children