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 is a response by the body's immune system to something (called an allergen) that is not necessarily harmful in itself. Certain people are sensitive to this allergen and have a reaction when exposed to it.llergies are the body's response to a substance called an allergen. Allergens themselves may not be harmful. However, in some people, things that are usually harmless can provoke a reaction. Allergic reactions vary and include many different symptoms.