Editor’s note: This story is a look back at some of the biggest headlines of the COVID-19 pandemic in March 2020. See a full timeline here. Five years ago, the World Health Organization declared the ...

A mask lies on a sidewalk. It’s hard to believe it's been five years since the start of the COVID-19 pandemic. Since 2020, the disease has killed more than 1.2 million Americans—more than in any other ...

A dismantled health infrastructure leaves the U.S. incredibly vulnerable, warns infectious-disease expert Michael Osterholm.

Five years ago, on March 11, 2020, the World Health Organization declared COVID-19 a pandemic. Whether it still is depends on who you ask. There are no clear criteria to mark the end of a pandemic, ...