The Trivalent Influenza Vaccine is designed to protect against three strains of the influenza virus. Typically, it includes two strains of the influenza A virus and one strain of the influenza B virus. This vaccine helps the immune system recognize and fight off these viruses, reducing the risk of illness during the flu season. Administered through an injection, the trivalent vaccine is recommended for most individuals, especially those at higher risk, such as the elderly and people with chronic health conditions. Vaccination not only helps protect individuals but also contributes to community immunity, reducing the overall spread of the flu.