weigh in. Be weighed; also, be of a particular weight. For example, Because it was such a small plane, the passengers and their luggage had to weigh in before takeoff , or The fish weighed in at 18 pounds. [Late 1800s] See also: weigh.
Asthma and allergic diseases, such as allergic rhinitis (hay fever), food allergy, and atopic dermatitis (eczema), are common for all age groups in the United States.
Progression of Hypersensitivity reaction â Type I Type I hypersensitivity is characterized by Ig E mediated reaction. Ig E are antibodies found in body secretion (such as tears, nose secretion) that are responsible for allergic reaction.