Immune Response to Allergens – When the System Overreacts

Imagine a security system so sensitive that it goes into full lockdown over a butterfly landing on the window. That’s the immune system during an allergic reaction—mistaking harmless substances like pollen, peanuts, or pet dander for deadly invaders.

Allergies are not signs of a weak immune system—they’re the result of immune overreaction. And while sneezing at flowers might seem minor, allergy-related conditions like anaphylaxis, asthma, and eczema can be severe—even fatal.

In this part, we explore why and how the immune system reacts to allergens, and what happens when regulation fails.