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 ...

A new, highly infectious COVID-19 strain that has been running rampant in China has now been detected in the US, including cases in New York City, according to the Centers for Disease Control and ...

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

A contagious new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now dominant in the United States, CDC data show. What to know about symptoms and vaccines.

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

Five years after COVID-19 struck the world, the origins of the virus remain unknown. A report released by the World Health ...

WHO’s Tedros says ‘all hypotheses must remain on the table’ after critical information not provided to investigators.

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

All hypotheses on how the Covid-19 pandemic began remain open, the World Health Organization said yesterday, following an ...

The origins of SARS-CoV-2 remain unsolved, concludes the full report from the World Health Organization’s Scientific Advisory Group for the Origins of Novel Pathogens (SAGO).1 Despite more than three ...