how do allergies work? What are they exactly?
In: Biology
An *allergic reaction* happens when your body’s immune system improperly says “Hey so this is *really dangerous,* let’s go attack it,” just like it would if you actually got an infection — only it’s responding to something generally harmless, like a peanut or animal fluff.
When that happens, it can cause different effects depending on where the allergen is encountered and what it is.
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