The immune system is a network of cells, tissues and organs, which protect the body against infection. It reacts quickly to infections, and neutrophils, other white blood cells and lymphocytes in particular play an important role, circulating in the bloodstream to fight infection.
> Find out more about the immune system
The most important organs in the immune system are the spleen and thymus. The spleen can become swollen in some cases of childhood leukaemia.
Leukaemia affects the immune system, damaging the body’s ability to fight infection from bacteria and viruses.
Protecting your child
Your child may be more prone to developing infections and they may be more severe and last longer than usual.
It’s very important to protect your child from infection by keeping them away from anyone with a cold or virus, such as measles or chicken pox.
Your healthcare team will be very experienced in preventing and treating infections and will help you to be on the lookout for signs and symptoms so your child can be treated immediately.