It started as a respiratory illness—or so everyone thought. But it quickly became apparent that SARS-CoV-2, the virus that ...

In the midst of pandemic upheaval, researchers have gained fundamental insights about how the body fends off infections.

SARS-CoV-2 virus, which emerged in Wuhan, China, in late 2019. The ensuing pandemic has killed millions worldwide. Vaccines have made the condition much less fatal for those who have been vaccinated, ...

The CIA now believes the virus responsible for the COVID-19 pandemic most likely originated from a laboratory.

Seasonal influenza, respiratory syncytial virus (RSV), and COVID-19 are actively circulating throughout the United States.