COVID-19 is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic. The symptoms of COVID‑19 can vary but often ...

In the time warp that COVID-19 created in most of our lives, it's hard to believe it's been five years since any of us first heard of a mysterious illness making people sick in China. But it was Dec.

Two weeks before a researcher made the genetic sequence of the SARS-CoV-2 virus available to the world, another Chinese scientist quietly posted it to a U.S. government website. The earlier posting ...

COVID-19 can have wide-reaching effects on your body, including blood vessel and nerve damage and brain injury. These effects could interfere with your body’s ability to develop or maintain an ...

We conducted a phase 2–3 double-blind trial to assess the efficacy and safety of nirmatrelvir–ritonavir in asymptomatic, rapid antigen test–negative adults who had been exposed to a household contact ...

Telemedicine use remains substantially higher than it was before the COVID-19 pandemic, although it has fallen from pandemic highs. To inform the ongoing debate about whether to continue payment for ...

Newly released documents indicate that a U.S. genetic database had received the sequence of the coronavirus two weeks before it was made public by others. By Benjamin Mueller In late December 2019, ...