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.
Food allergies are divided into three types, depending on symptoms and when they occur. 1  IgE-mediated food allergy â the most common type, triggered by the immune system producing an antibody called immunoglobulin E (IgE). 2  Symptoms occur a few seconds or minutes after eating.