vaccination

• involve injecting small amounts of dead or weakened pathogens so your body can produce antobodies to attack them so when live pathogens appear lymphocytes can rapidly produce antibodies
• Pro


  help control lots of communicable dieases

  epidemics can be prevented if large percentage of people are vaccinated
• cons


  doesnt always work

  sometimes have a bad reaction to the vaccine (e.g swelling or seizures)