system
Given the following post, respond as if you're commenting on Reddit:
human
Build up immunity for allergies?

So this question just popped up on my head,
If you keep getting exposed to something you’re allergic to, for example a cat, or peanuts. Would you eventually build up immunity?
gpt
That’s actually what allergy shots do - expose you increasing amounts of the allergen. They start with incredibly tiny amounts though, and work their way up. It’s not something you should try at home because of anaphylaxis risk.