The winter flu season features two types of influenza. Here's what you need to know about them and how they differ.

Partial CDC data suggest that influenza deaths may have already reached as high as 2% of deaths for the week ending on Feb. 1 ...

Influenza levels in the US are the highest they've been in 15 years amid winter weather and a second wave of the virus.

Flu-related hospitalizations are at an all-time high as the virus continues to surge across the state.

The flu continues to spread around Colorado, and locally, we're still seeing related hospitalizations. “What we're experiencing right now is certainly high levels of influenza. We believe that we are ...

During the week of Jan. 26 through Feb. 1, 2025, flu activity remained elevated in the United States, with 43 states ...

Influenza cases remain high nationally, and Atlantic Canada is bracing for peak of rising RSV cases despite declining rates ...

Influenza A virus particles strategically adapt their shape -- to become either spheres or larger filaments -- to favor their ability to infect cells depending on environmental conditions, according ...

During the first years of the COVID pandemic, elevated precautions mostly suppressed the perennial flu outbreaks that ...

Both COVID-19 and Respiratory syncytial virus are occurring at much lower levels than in previous years, though they are ...

Flu deaths have surpassed COVID-19 in California for the first time since the pandemic, with concerns over low vaccination rates and a likely severe flu season.

A new variant of the bird flu has infected a dairy worker in Nevada marking the state's first human case of the H5N1 avian influenza.