Vaccines are a major public health success story, but the COVID-19 pandemic underscores the many challenges involved in getting a vaccine to everyone who needs it.

A group of international health experts found in 2019 that the world wasn’t ready for a pandemic. This year’s coronavirus outbreak has shown they were right.

The Trump presidency has demonstrated the appeal of populist authoritarianism to many Americans. The way the country responds to the attack on the U.S. Capitol will indicate how long this movement la…

The Madrid summit paved the way for Finland and Sweden to join and underscored that Russia is NATO’s chief security threat. But the alliance’s new defensive efforts aren’t likely to change Putin’s st…