A penicillin allergy is an allergic reaction that occurs when your body's immune system overreacts to penicillin antibiotics.

An allergic reaction occurs when the immune system overreacts to an allergen in the venom of a stinging or biting insect.

Linking how people and fiscal systems overreact to fear, Harris forwards a sly take on our overwrought times.

When this suppression vanishes, the parasympathetic system may overreact, as typical for any Closed-loop transfer function.

An allergic reaction to the sting occurs when your body's immune system overreacts to the venom of stinging insects.

Several suggested that the legal system had overreacted and perhaps acted capriciously.

"The body's own immune system can overreact to a trigger that prompts it to kick into high gear," says Esrailian.

Allergies share the same etiology: The immune system overreacts to the presence of harmless proteins normally not found in the body.

The immune system overreacts to the foreign substance, usually an animal or vegetable protein.

When you have an allergic reaction, your body's immune system is overreacting to a harmless substance.