immunity, vaccination and drugs

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  • Created by: vezting
  • Created on: 03-04-16 15:25
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  • immunity, vaccination and drugs
    • types of immunity
      • active natural is when you become immune from actually catching the disease
      • active artificial is when you become immune from a vacination of a harmless amouth of the pathogen
      • passive natural is when a baby becomes immune due to the antibodies it recieves from its mother via placenta or breast milk
      • passive artificial is when you become immune after being injected with anti-bodies from someone else
      • herd immunity
        • when most people in the population are vaccinated,
        • even if you are unvaccinated you are unlikey to catch the disease as theres nonone to catch it from
      • ring immunity
        • used in livestock when there's an outbreak of the disease
        • the surrounding areas are vaccinated so the disease cannot spread past that specific area
    • vaccines
      • cause your body to produce memory cells against the pathogen
      • these  zntigens may be free or attched to a dead pathogen when injected into the body
      • booster vaccines may be needed after some years and memory cells T and B have limited life span
      • some vaccines are taken orally
      • oral vaccines may get broken down by enzymes in the gut
      • the molecule may also be too large to be absorbed from gut to blood stream
    • influenza
      • proteins on the surface of the virus act as antigens
      • these prtoeins change reguarly
      • this also means the vaccine has to keep changing and constant research has to be continuous, old vaccines wont be effective
    • natural drugs
      • penecilin is obtained from fungus
      • some cancer drugs are made from soil bacteria
      • daffodils can be used to treat alzheimers


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