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.

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 ...

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

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

A cutting-edge gene therapy has significantly restored hearing in children and adults with congenital deafness, showing ...