Share Tweet Share Email Follow. The Tony Awards are finally here and weâve got all the details on what time theyâre on, which channel you need to watch and where the show is taking place. This year, there are two hosts â Alan Cumming and Kristin Chenoweth, who are Broadway royalty.
An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off a perceived threat that would otherwise be harmless to the body. Such reactions are called allergies.
An allergy refers to an exaggerated reaction by the immune system in response to exposure to certain foreign substances. The response is exaggerated because these foreign substances are normally seen by the body as harmless in nonallergic individuals and do not cause a response in them. In allergic individuals, the body recognizes the foreign substance, and the allergic part of the immune system generates a response. Allergy-producing substances are called allergens.. Examples of allergens include pollens, dust mites, molds, animal proteins, foods, and medications. When an allergic individual comes in contact with an allergen, the immune system mounts a response through the IgE antibody.