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  • Created by: bwillows1
  • Created on: 11-05-14 13:21
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  • vaccination
    • vaccinations use a safe version of a dangerous organism
    • when you are infected with a new microorganism it takes the white blood cells a few days to produce enough antibodies to help them deal with it.
      • you could get pretty ill within this time
    • immunisation involves injecting dead or inactive microorganisms
      • still carry the same anitgens
        • which means body produces antibodies to attack them
          • even though microorganism is harmless (because it is dead//inactive)
      • body produces memory cells that recognises the antigens of the microorganism and stays in the blood
        • if microorganisms of same type appear after that the memory cells can rapidly produce antibodies to kill them off
          • normally means you can get rid of the microorganism before it makes you ill
    • epidemics can be prevented by vaccinating lots of people
      • to prevent large outbreaks of disease a large number of the population needs to be vaccinated
        • if lots of people are not vaccinated
          • diseases spread quickly
        • if lots of people are vaccinated
          • even people who are not vaccinated are not likely to catch the disease because less people to pass it on
    • vaccines and drugs have different effects on different people
      • can never be completely safe for everyone
        • people have side effects
          • can be more serious for some more than others
        • genetic differences also mean that people react differently to drugs and vaccines
          • different times for how long people can be under anasthetic (eg)


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