PRIORIX is a vaccine used to protect against measles, mumps, and rubella (MMR), three common and highly contagious viral diseases. It is a live attenuated vaccine, meaning it contains weakened forms of the viruses that cause these diseases, allowing the immune system to build protection without causing the diseases themselves. PRIORIX is administered via injection, typically in the arm, and is often given in two doses during childhood according to vaccination schedules. This vaccine is widely used across the globe as part of public health efforts to control and eliminate the spread of these potentially serious infections. By stimulating the body's immune response, PRIORIX provides long-lasting immunity, significantly reducing the incidence of measles, mumps, and rubella in vaccinated populations.