The updated mRNA-1273.815 COVID-19 vaccine was significantly protective against hospitalization and medically attended outcomes among adults in the United States.

Cleric women wearing protective clothing and “chador,” a head-to-toe garment, arrive a cemetery to prepare the body of a ...

5 Years Later: What Caused COVID-19? The World Health Organization called COVID-19 a pandemic for the first time five years ago today. The origin of COVID-19 is still unknown, though the leading ...

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 ...