A highly contagious new COVID variant is spreading across the United States. It's called NB.1.8.1, also known as Nimbus.

Viruses closely related to the deadly MERS coronavirus are lurking in bats and one group, known as HKU5, may be just one mutation away from making the jump to humans. A new study reveals how these ...

"These viruses are so closely related to MERS, so we have to be concerned if they ever infect humans," said virologist Michael Letko.

A dangerous mpox outbreak is unfolding in Sierra Leone. In just the first week of May, cases rose by 61%, and suspected cases ...

Members of the public are being urged to be on alert amid a surge in cases of a highly transmissible new Covid-19 variant, which causes a very sore throat in patients ...