Journal of Clinical and Translational Science, reveals that the flu vaccine is the single most important way to protect people’s health this fall and winter.Seasonal flu activity can be unpredictable, and it is common for otherwise healthy people to be hospitalized due to critical respiratory infection each year.Statistics from the Centers for Disease Control and Prevention (CDC) show that during the 2019-2020 United States flu season, there were 39–56 million cases of the disease.