A global study has found strong evidence that a new form of the coronavirus has spread from Europe to the US. The new mutation makes the virus more likely to infect people but does not seem to make ...

In a sealed lab, a string of code has become something stranger and more unsettling than software. Using artificial intelligence, researchers have written the genetic instructions for a virus that has ...

A ferocious surge of flu cases is linked in part to a variant that has not been dominant in the past few years — resulting in a waning of natural immunity.

A variant strain of the coronavirus, one that was first discovered in the United Kingdom, is now the dominant strain of the virus circulating throughout the United States, CDC Director Rochelle ...

Amid the push to get the COVID-19 vaccine to many as possible to stem the pandemic, a new variant of the coronavirus that exploded in Brazil and has since been reported in the U.S. is causing concern ...

Bird flu has always worried pandemic planners, but a new twist is raising the stakes: scientists are now tracking variants that can keep multiplying even when a human body turns up the heat. A strain ...