The swift development of effective vaccines against COVID-19 was an unprecedented scientific achievement. But production challenges, vaccine nationalism, and new variants have all presented hurdles.

The United States accepts hundreds of thousands of foreign workers each year in a variety of industries. Persistent U.S. labor shortages and accusations of abuse have reenergized the debate over the scale of these programs.

The federal agency has a broad mandate to protect Americans’ health and an expansive global reach. But the COVID-19 pandemic has been one of its most daunting challenges.

Water scarcity threatens the health and development of communities around the globe. Climate change is intensifying the problem, pushing governments to find more innovative, collaborative ways to add…