In the U.S., flu season typically runs from October to May, most commonly peaking between December and March. During the 2016-2017 flu season alone, 145.9 million people were vaccinated against influenza. Although modern medicine has significantly impacted the number of people affected by the flu, there was a time when tens of millions around the globe felt its reach. While vaccination is an effective course of preventative treatment, protection is not guaranteed. To boost protection, try the following recommendations: