Warnings rise for U.S. as severe flu strain causes outbreaks in Canada, U.K.
Warnings rise for U.S. as severe flu strain causes outbreaks in Canada, U.K.
www.nbcnews.com
Warnings rise for U.S. as severe flu strain causes outbreaks in Canada, U.K.
A flu strain that emerged over the summer is causing "unprecedented" outbreaks in Japan, as well as in Canada and the U.K. The CDC hasn't provided insights on flu in the U.S. in nearly two months.
