vaccination

• vaccination protects from future infections
• vaccinations involve injecting small amounts of dead or inactive pathogens, which cause an immune response, making the person become immune
• if a pathogen of the same type appears after a vaccination, the white blood cells can rapidly mass-produce antibodies to kill off the pathogen
• vaccinations have been developed to prevent diseases such as measles, mumps, and rubella
• big outbreaks of diseases are called epidemics