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Vaccinations

QuestionAnswer
Drug/medicine A chemical which alters the body. Often extracted from plants (eg aspirin) and microorganisms (eg penicillin).
Toxicity If it is toxic
Efficacy How well it works
Dose How much of a drug you need to take to make it work
Placebo A pill without the drug in it. Taken to check drug effectiveness
Double blind trials Neither the patient nor the doctor know whether the patient is in the control group or not –prevents bias.
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