Allergic reactions are a serious condition many Americans face due to an abnormal immune response in the body that, in some cases, can result in death. An allergic reaction occurs when the immune ...

Rheumatoid arthritis is associated with an atypical immune response called a type 3 hypersensitivity reaction. This reaction happens due to immune complexes in the body. It can be treated by ...

Chemical Reactions: A chemical reaction is a process where the substances 8unbdergo a change in their chemical composition. The substances that enter the reaction are called reactants that are then ...

Drug hypersensitivity reactions are drug reactions which are unpredictable. They result from an interaction between a drug substance and the immune system of a hypersensitive person. Hypersensitivity ...

We all overreact to certain situations in life—some of us more than others (slowly raises hand). But when your immune system overreacts to a harmless substance, also known as an allergen, your body ...

When they started, they expected to see a run-of-the-mill chemical reaction. What they discovered was an atomic-level dance that no one predicted. After three years of study, researchers have found ...