Flu A is more common and can infect humans and animals, allowing it to cause widespread outbreaks. Flu B only affects humans, ...

But what kind of sickness do your symptoms point to? Here's a breakdown for COVID-19, flu and more — and why testing is so ...

Flu is a mild illness for some people. But for others, including older adults and those with chronic (long-lasting) health conditions, the flu can be very serious and even life-threatening.

Learn about the differences and testing for flu A and B and COVID-19 and how to make holiday travels and gatherings safer." ...

The study period comprised 3 influenza seasons, 2005–2006 to 2007–2008. Patients were included in this analysis if they were ≥ 18 years of age, were hospitalized with laboratory ...