Vaccination and drugs

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  • Vaccination and drugs
    • vaccinations involve injecting small amounts of dead or inactive micro-organisms. They prevent disease.
      • these carry antigens which cause your body to produce antibodies to attack them even though it is harmless
      • if micro-organisms of the same type appear again the white blood cells can rapidly mass produce antibodies to kill off the pathogen
    • Pros of vaccination:   - they have helped to control lots of infectious diseases e.g tetanus&polio -epidemics can be prevented
      • Cons of vaccination:   - they don't always work   - although its rare, some people have a bad reaction to vaccinations
    • drugs such as asprin are just pain killers and do not tackle the disease
    • antibiotics kill/prevent the growth of the bacteria causing the problem without killing your own body cells
      • antibiotics do not destroy viruses as viruses reproduce using your own body cells making it difficult to develop drugs that would destroy the virus without destroying your body cells
    • bacteria can become resistant to antibiotics
      • the individual resistant bacteria will survive and reproduce and the population of the resistant strain will increase




this is so useful

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