A new Covid-19 variant called NB.1.8.1, or Nimbus, represents about a third of new US Covid-19 cases. Dr. Leana Wen answers common questions about the new variant.

An expert group from the World Health Organization failed to find a definitive answer to the COVID-19 pandemic’s origins in ...

New WHO report suggests COVID-19 originated from animal-to-human transmission, though Director-General Tedros maintains all ...

New viruses that are genetically similar to known fatal viruses have been discovered near food sources in a concerning new ...

Twenty new viruses have been discovered within bats in China, "raising urgent concerns" that these diseases might spill over ...

First things first: unlike Covid-19, what is happening in China is not a new virus, it is human metapneumovirus (HMPV), an “old” virus that was discovered in the Netherlands in 2001.

The World Health Organization’s expert group says the origin of COVID-19 remains inconclusive, though most evidence still ...

Scientists have discovered 20 new viruses in bats in Yunnan, China. In a world still recovering from COVID-19, findings like ...

The WHO Scientific Advisory Group reported progress in understanding COVID-19's origins but noted that critical information ...

Medical experts have sounded the alarm after 20 new bat viruses were identified in China, urging Australians to remain ...