Quote:
Originally Posted by biker1
The control group gets the placebo. They won't have adverse reactions.
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Without the long post to which biker was replying this is a bit confusing, but the earlier post was that in studies they watch for adverse effects in the active as well as placebo group.
Biker you are simultaneously right and wrong. No one knows what the risks might be of a medication or vaccine. So while something that happened long term might be an adverse reaction to the shot the only way to know is to record all events in both groups. This might include obvious things like hives or fever but also things like kidney failure or arthritis or heart attacks. Kidney failure is going to happen in any group you watch over months or years. The question is does it happen significantly more often in the drug group. So yes, the manufacturer watches for all outcomes short and long term in the active and placebo group as that data is needed for comparison and risk assessment.
Only after analysis can it then be said if an outcome is a drug related adverse event or the background expected rate.