I WONDER - What Is An Allergy?

The video explains how the immune system can mistakenly identify harmless substances like pollen or peanuts as threats, leading to allergic reactions. These reactions can cause symptoms such as sneezing and itching. Allergies occur when the immune system wrongly perceives certain antigens as harmful.

Can you explain the relationship between allergies and the immune system's response?

How does the immune system differentiate between harmful and harmless substances?