UNICEF is the world's largest distributor of vaccines to the developing world, supplying vaccines for more than a third of the world's children. UNICEF and its partners support immunisation programmes in over 100 countries to protect the lives of all children.
Blog: Five things you never knew about immunisation
In emergencies such as conflict or a natural disaster, we deliver vaccination campaigns to help protect vulnerable children from preventable diseases when health services are down.
Globally, children face many challenges, but disease is one of the greatest. Almost one third of deaths of children under five are preventable by vaccine. For just £12, we can vaccinate a child against six of them: measles, polio, tetanus, TB, diphtheria and whooping cough.
There's still a lot of work to be done, but today 4 out of 5 children are being immunised – that's more than ever before. With your help, we could eliminate a number of these terrible childhood diseases in our lifetime.
In 2012, Ewan McGregor filmed a BBC documentary, Cold Chain Mission, about UNICEF's immunisation work. Find out more.