According to the Centers for Disease Control and Prevention, the 2016-17 flu season has peaked and numbers of confirmed cases in Maine and nationally are decreasing.

The flu season runs from October into May. It isn’t clear why flu is seasonal. It is probably a combination of cold weather forcing people into close proximity indoors and cold dry air which seems to make transmission of the virus easier and also to prevent humans from fighting off the flu.

Hover over the map for detailed county-by-county statistics, or compare week-by-week numbers by hovering over each week’s bar in the bar chart.

This interactive was updated on April 26, 2017 to include the most recent data from the previous week.

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