Quadrivalent influenza vaccine

The quadrivalent influenza vaccine is designed to protect against four strains of the influenza virus: two from the A group and two from the B group. Each year, health experts predict which strains are likely to be most common and include them in the vaccine. By immunizing with the quadrivalent vaccine, individuals reduce their risk of getting the flu and its complications. It’s administered annually, usually before the flu season, and is recommended for people of all ages to help prevent the spread of influenza in the community.