Investigators also have been closely watching another kind of influenza virus, the Type A H5N1 version of bird flu. The CDC says 66 human U.S. cases of that were reported last year, but none of ...
In Cuyahoga County, influenza A, one of four types of flu viruses, is the reason weekly flu-related emergency room visits spiked in December, from 220 to more than 400, according to county health ...
The common cold can be caused by several different types of viruses and can ... or low fever for less than a week. — The flu, caused by influenza viruses that are always changing, leads to ...