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 ...

While the common cold and influenza (the flu) are viral respiratory infections with many overlapping symptoms, different viruses cause them. Both illnesses are highly contagious, and adults in ...

It can affect adults and children but tends to be more severe in adults. Flu B only affects humans and, more commonly, infects children. While it usually has mild symptoms, it can have more severe ...

A Canadian teenager infected with bird flu — that country’s first case involving a locally acquired infection — is in ...

Infants, young children, and adults older than 65 are most at risk for severe flu symptoms. The difference between influenza A and B, another type of flu virus, is that A is typically more common ...

The seasonal COVID-19 spike, combined with rising cases of seasonal flu and RSV, brings what has been called a “tripledemic.” ...

Cases in younger children are particularly worrying, health experts said, because walking pneumonia has historically been ...

Although flu symptoms may resemble those of the common cold ... The flu vaccine is especially important for people who are at ...