April 7 is World Health Day and also the 75th anniversary of the World Health Organization’s (WHO) founding. Each year, the WHO selects a theme for World Health Day, and this year’s theme is Health for All—a message that promotes health equity and taking action to ensure that everyone can have good health.

Understanding the challenges communities face is a step towards being able to enact change. To broaden your knowledge of health-related issues and topics, check out these fact sheets from the WHO.