Top 4 Reasons To Get the Quadrivalent Flu Vaccine August 7, 2014 By Cait Hartwyk Leave a Comment 1. Offers 33% more protection than the trivalent vaccine. The trivalent vaccine was designed to protect against three different flu viruses: two A viruses and one B virus. Experts found that the vaccine did not help protect against the second group of B viruses. Therefore, this additional strain was added to the quadrivalent vaccine which gives broader protection. 2. Broad protection against both B strains is critical. On average, influenza associated-associated hospitalization and mortality rates are higher with type B than with type A influenza. In addition, B strains cause epidemics every 2 to 4 years, and the impact of B strains is much greater in children and young adults. 3. Four is better than three. It’s difficult to predict which flu virus strains will predominate during a season, so it’s critical to make sure you are protected from all four strains. You never want to take chances on your health! The quadrivalent vaccine eliminated the need to guess which B strain will be more likely to circulate. 4. Quadrivalent flu vaccinations can reduce the risk of more serious outcomes. Getting the quadrivalent flu vaccine is important for protecting yourself and other people around you. In fact, studies show that had the vaccine been available in past years, the quadrivalent vaccine could have potentially prevented 21,000 hospitalizations and nearly 1,400 influenza-related deaths between 1999 and 2009.