Chickenpox (varicella) 

Chickenpox (also known as varicella zoster virus) spreads very easily. It is very common in the UK, and mostly affects children, but anyone can catch it. If someone hasn’t had chickenpox before, there is a high risk (up to 90%) they will catch chickenpox if they are near someone who is infected. 

For most children, chickenpox is a mild illness that gets better without medical treatment, but for some people it can be very serious. The risk of serious illness from chickenpox, is much higher than people realise. Some people may need to be treated in hospital if they get problems from the infection. 

Symptoms of chickenpox are usually worse in adults, particularly pregnant women. These individuals are more likely to develop health issues. 

Infection from chickenpox can lead to serious illnesses, such as severe bacterial infections of the skin, lung problems (such as pneumonia), fits (seizures), swelling in the brain (encephalitis), or stroke in children.  

Once you’ve had chickenpox, it is unlikely you’ll get it again. However, the virus can stay in your nerves and can cause shingles when you are older.

Symptoms of chickenpox include a rash of red, itchy spots that turn into fluid-filled blisters.  

The blisters then crust over to form scabs, which eventually drop off. 

Before the rash appears, you or your child may have some mild flu-like symptoms. 

Learn more

If you would like to learn more about the vaccines, or the diseases they protect against, a number of information resources are available to help.

You can also call NHS 111 (external site) or your GP surgery for advice if you have any questions.