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.

Germany, once dangerously dependent on Russian energy, has defied Russian expectations in its reaction to war in Ukraine.

COVID-19 is contributing to a dramatic decline in the average lifespan of Americans. The drop-off is canceling out decades of public health gains and stretching the gap between the United States and …

Some governments and businesses are starting to use digital and paper passes that certify a person has been immunized against COVID-19, spurring debate over the ethics of vaccine passports.

COVID-19 cases are surging across the United States, forcing Americans to weigh the risks of gathering for the Thanksgiving holiday. How have other countries handled holidays amid the pandemic?