The 2017-2018 flu season was the worst on record in 40 years. According to the U.S. Centers for Disease Control and Prevention (CDC); [The] Flu killed 80,000 people this past season and put 900,000 into the hospital, making it the worst influenza season in decades. [Typically the] flu kills anywhere between 12,000 and 56,000 people a year, depending on how bad the flu season is, and that it puts between 250,000 and 700,000 into the hospital with serious illness.