Nov 16, 2016 - According to the CDC, it's not possible to predict what this flu season will be like. While flu spreads every year, they say, the timing, severity, and length of the season varies from one year to another. Flu season starts around this time of year and peaks from December to March, but now, while there is no serious epidemic, is the time to do something about it. The National Institutes of Health estimates that the flu costs $7 billion per year in sick days and lost productivity. And workers report their productivity decreases by half when powering through the flu at work. This issue is aimed at helping prevent infection and spreading the flu.