With the 2016-2017 flu season over, the CDC has finished evaluating the effectiveness of last year’s vaccine.
While it might seem pointless to research an old vaccine, this could greatly help this year’s flu shot. The reports measure the vaccine’s effectiveness to improve it for the 2017-2018 flu season.
According to the CDC, flu activity in the United States was moderate during the 2016-2017 season. Activity was low in November, slowly growing until the virus peaked in February.