TED-Ed: Why do people have seasonal allergies? - Eleanor Nelsen

The video explains seasonal allergies, their symptoms, and the immune system's role in causing them. It discusses how genetics and environment influence allergy development, including theories like the hygiene hypothesis. Common allergens and severe reactions like anaphylaxis are covered, along with treatment options such as medications, immunotherapy, and unconventional methods like hookworms.

What new insight or understanding did you gain from this video?