The U.S. registered its first death from measles since 2015 this week, as a child who wasn’t vaccinated died in a measles outbreak in rural West Texas

A yet-unidentified illness has killed 53 people and potentially infected hundreds more in the Democratic Republic of the Congo. The World Health Organization is investigating the outbreak.

Twenty-five years ago, the World Health Organization and U.S. officials celebrated a WHO declaration that a highly successful