Don't Believe the Myths, They're Just That. Flu season arrives every year with variations of intensity. This year, the Type A, H3 influenza strain is impacting people of all ages, and specifically in Boston, where 700 cases have been reported compared to 70 at the same time last year. Fortunately, this season’s flu vaccine does cover the H3 strain, so officials from the Centers for Disease Control and Prevention (CDC) continue to urge people to get their flu shot. Have you received a flu shot yet?