University of Pennsylvania researchers have developed an mRNA vaccine for the H5N1 avian flu drawing increasing scrutiny by public health officials. The vaccine is effective against the virus in mice ...

While the new findings are encouraging, "vaccines won’t do any good if people don’t get them," one expert said.

The United States is currently facing the worst flu season in over 15 years, with cases surging in most states. Over 33 million Americans have gotten sick this season so far, and elevated flu activity ...

A new type of seasonal flu virus is raising concerns among health officials as winter approaches. Scientists are closely watching H3N2 subclade K, a newly emerged variant that is genetically distinct ...

Flu cases in the U.K. are already triple what they were at this time last year. Here Andreas Philippi (l), Lower Saxony's minister for social affairs, labor, health and equality, gives the flu vaccine ...