Infection and Response Practice Test

Vaccination trains the immune system to recognize and fight specific viruses, lowering how many people get infected and how quickly the disease spreads through a community. The MMR vaccine, which protects against measles, mumps and rubella in one shot, has led to substantial drops in all three diseases wherever routine vaccination is in place. These illnesses are highly contagious, so a strong vaccination program dramatically reduces their incidence and outbreaks. The material highlights this clear, broad impact of vaccination on these three diseases, making it the best fit.