In a strange twist, a type of the virus that usually hits later is striking early in the southern and western U.S.
The flu is out in force. And so far this season, it’s been hitting children the hardest.
Influenza is a wily virus—it’s almost impossible to predict where and how it will strike as it circumnavigates the globe. There are, however, some patterns that routinely occur, allowing investigators and public health agencies to sometimes anticipate what lies ahead.