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Notes -
So, does it mean if I injected somebody (non-allergic) with peanut butter extract mixed with an adjuvant (provided I find a safe way to do it without causing them harm) they'd get a peanut allergy?
Conversely, if somebody were vaccinated, e.g. against flu, and subjected constantly to low doses of flu virus - would they lose the immunity eventually? If not, again, why does it work with allergens and not with the flu virus?
In the first case, unless they already had a genetic predisposition to peanut allergies, it's unlikely that they'd develop an allergy at all. They might develop a local hypersensitivity reaction at the time of injection, but I don't believe that it'll go as far as making normal peanut butter eaten later an allergen.
In the second case, I'm unsure myself.
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If you have some immunity to the flu, but it's spreading around your community, you are subjected constantly to low doses of flu virus!
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