1. Are we prepared if Petrov overreacts?

2. Allergies develop when a person’s immune system overreacts to substances that are usually harmless

3. The government often overreacts to newly discovered dangers and pours disproportionate resources into hastily conceived remedies.

4. Seasonal Allergies, like other Allergies, develop when the body’s immune system becomes sensitized and overreacts to something in the environment

5. Allergy Symptoms Allergy symptoms occur when your immune system overreacts to an allergen—something that usually is harmless, such as plant pollen, …