Dengue vaccine (Dengvaxia)

Dengvaxia is a vaccine designed to protect against dengue fever, a mosquito-borne illness caused by four different viruses. It works by stimulating the body's immune system to recognize and fight these viruses if exposed later. The vaccine is recommended for individuals who have already had a dengue infection, as it reduces the risk of severe disease and hospitalization. However, for those without prior infection, it may increase the chance of severe dengue if they get infected later. Therefore, testing prior to vaccination is advised to ensure safe and effective use.