Photograph by Kate Holt
A health worker prepares to deliver a pneumonia vaccine.
Vaccines are one of the best buys in global health. While we have effective vaccines to protect children against a range of diseases - from pneumonia, to measles, to rubella - there are still millions who miss out on these innovations. Inequalities in gaps to vaccines, with only 7 percent of children receiving all of the World Health Organization's recommended vaccines in the world's 73 poorest countries.
Strong health systems, especially primary health care systems, can provide children with the lifesaving immunizations they need. Innovations also have a role to play in bridging gaps in access. For example, efforts are underway to develop alternative delivery methods and extend the lifetime and storage of vaccines.