Hypersensitivity pneumonitis involves inhalation of an antigen. This leads to an exaggerated immune response (hypersensitivity). Type III hypersensitivity and type IV hypersensitivity can both occur depending on the cause. Diagnosis. The diagnosis is based upon a history of symptoms after exposure to the allergen and clinical tests.
Whitewater definition, of or moving over or through rapids: whitewater rafting down the Colorado River. See more.
Seawater Gets a New Definition. Seawater is a lot more complex than a simple solution of water and sodium chloride. As researchers have been discovering for the past century, it is a highly variable cocktail, and its particular makeup can have a substantial impact everything from coral to currents.