WHO director Dr Tedros Adhanom Ghebreyesus says all hypotheses are on the table, as the organisation works to reinforce ...

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

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 ...

An expert group charged by the World Health Organization to investigate the origins of the COVID-19 pandemic has found no ...

Variant NB.1.8.1 accounted for 0% of U.S. cases in April. By mid-June, it was estimated to be the cause of around 37% of ...

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

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

A new COVID variant called NB.1.8.1, aka Nimbus, is spreading in the U.S. and causing an incredibly painful sore throat, ...

A new COVID-19 variant is spreading rapidly through the U.S. What to know about NB.1.8.1 and its symptoms in Tennessee.