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

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

Says a pediatric infectious disease physician, “Our expectation is that we’re going to have several more weeks yet of a lot ...

Flu infections are at or near their highest levels in at least 15 years and are still rising, the Centers for Disease Control ...

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

The volume of recent flu infections and related hospitalizations is higher than what Sonoma County epidemiologists have ...

The US is in the throes an unusually intense and severe flu season, with hospitalization rates topping the levels seen with ...

A new CDC report found evidence of previous bird flu infection in veterinary practitioners who work with cattle and who did ...

Indiana is seeing "very high" rates of influenza activity in emergency rooms, urgent care centers and primary care offices ...

State health officials are reminding Montanans to take precautions to protect against influenza infection. Montana is currently experiencing widespread influenza activity, with cases and outbreaks ...

In addition, more people died in Pennsylvania from the flu over the last two reporting periods than died of COVID-19, data ...

The most common complication of severe influenza is pneumonia, a lung infection that can result from the flu virus or from a secondary bacterial infection, Dr. Liu said. The flu can also trigger ...