During this week, of the 4,377 viruses reported by public health laboratories, 4,264 and 113 were influenza A and B, respectively. Of the 3,458 influenza A viruses subtyped, 53.7 percent were ...
U.S. medical services providers are seeing the greatest numbers of flu cases since the 2009-2010 flu season, the Centers for Disease Control and Prevention announced on Friday.