Vaccines have made a huge difference to child survival rates. They prevent an estimated 7,000 child deaths a day and save billions of pounds in health bills by preventing deadly diseases.
Despite significant progress made in reducing childhood mortality, nearly two million children die each year from vaccine-preventable diseases.
Most of these deaths occur in low-income countries. Pneumonia and diarrhoea are the two leading killers, causing nearly 40% of all childhood deaths.