A year-end look at the new disease variants that emerged in 2025, from evolving COVID strains and flu subclades to mpox and ...

The U.S. Food and Drug Administration is considering adding the strongest safety warning available to COVID-19 vaccines, ...

Some studies suggested a strong protective effect, while others showed greater infection risk when people wore masks.

Mexico has confirmed its first case of influenza A(H3N2) subclade K, a variant commonly referred to as the "super flu," ...

Flu season intensifies as the new H3N2 variant causes severe illness worldwide. Experts urge vaccination, hand-washing and staying home when sick to prevent transmission.

A surge in cases of the ultra-contagious stomach bug norovirus is being fueled by a new strain of the disease, experts have ...

Flu, COVID and seasonal colds are all circulating this winter, and their symptoms can be surprisingly similar. Here’s how to ...

An ultra-contagious variant of norovirus is spreading throughout the US and UK. The strain, known as GII.17, led to a surge ...

Flu season is hitting Quebec early and “with a vengeance,” spurring health officials to counsel citizens to get their free ...

Flu-like activity is up in some parts of the United States, according to the Centers for Disease Control and Prevention.The ...