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 ...
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 ...
If you do get sick with the flu, the most common symptoms include a sudden onset ... in similar numbers of hospitalizations and deaths in adults. In children, however, influenza B may cause ...