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Fighting diseases (Antibiotic resistance (Bacteria can mutate - some…
Fighting diseases
Antibiotic resistance
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This occurs if you have an infection and are treated with antibiotics, there is a chance one of the bacteria will mutate
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Resistant bacteria survive and reproduce, so the population of resistant bacteria increases at an exponential rate
Cause serious infections as cannot be treated eg. MRSA causes serious wound infections and is resistant to meticillin
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Vaccination
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Vaccinations inject small amounts of small or dead pathogens which allow the white blood cells to get used to the pathogen
When the pathogen enters the body the white blood cells can rapidly produce antibodies to kill the pathogen
Pros
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Epidemics (big outbreaks of disease) can be prevented if a large percentage of the population is vaccinated
Cons
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Sometimes have a bad reaction to a vaccine eg, swelling or a fever
Where drugs come from
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For example - aspirin used to treat headaches and lower fever was found in willow. Digitalis used to treat heart conditions found in foxgloves
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Drugs
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Antibiotics tackle the cause of the problem and kill invading pathogens - different antibiotics kill different pathogens
Antibiotics however don't destroy viruses as the viruses are located inside body cells, so it is very difficult to destroy the virus and not the cell