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

While we often refer to it as "the flu," the influenza virus has several strains. Here's what to know about the two most ...

While we often refer to it as "the flu," the influenza virus has several strains, with flu A and flu B considered the most ...

The flu can also cause a general feeling of fatigue or malaise, Ray says, as well as gastrointestinal issues like diarrhea ...

There are two broad types of influenza — flu A and flu B — and many strains within those, but the current spike in flu cases ...

The influenza A virus genome consists of eight segments of single-stranded, negative-sense viral RNA, which encode multiple ...

Flu A and flu B are two different strains of influenza, explains Thomas Russo, M.D., professor and chief of infectious ...

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.

Each year, flu experts from around the world gather to map out recommendations for next winter's flu vaccine. This year, it's ...

There’s a mystery unfolding in the world of science: the disappearance of Influenza B/Yamagata. Since early 2020, researchers haven’t sequenced or isolated a single sample of this flu strain. Once a ...

The flu is spreading far and wide across the U.S. – and influenza A is largely to blame. Of all the flu tests reported to the ...

A new study says the flu A viral strain can adapt shape to stay infectious. Infectious disease doctors break down what this ...