What is clinical condition that occurs when an immediate hypersensitivity reaction occurs in the respiratory tract? how is it treated?

A hypersensitivity reaction occurs if some unknown microorganism or particle enters the nose or mouth by inhaling it and the system tries to eliminate it by breathing and exhaling hard resulting in the elimination of the antigen without extensively damaging the host’s tissue. To prevent it and treat it, one must move away the cause of the reaction and take an epinephrine medicine.

The answer is texture

2hydrogen and 1 covalent