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 ...

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

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

Smallpox was eradicated in 1977. This amazing, global public health achievement isn’t just a page in a history book or an ...

Bats living among the orchards of Yunnan province in southwest China have been found harboring a variety of unknown pathogens ...

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

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 ...

The World Health Organization said on Friday that efforts to determine the origins of SARS-CoV-2, the virus that caused the ...

A Chinese study uncovered two novel viruses in bat kidneys capable of causing respiratory problems and fatal brain inflammation in humans.