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 ...

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 ...

Scientists in China's Yunnan province have discovered 20 new viruses in bats, including two closely related to the deadly ...

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

"Until further requests for information are met, or more scientific data becomes available, the origins of SARS-CoV-2 and how ...

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

Researchers discovered 20 new viruses and two henipaviruses closely related to deadly Nipah and Hendra strains in Yunnan bats ...

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