Which of the following is NOT a common response to Type 1 Hypersensitivities? Hay fever Clot formation Hives Anaphylaxis

The answer is Clot formation. Type 1 hypersensitivities, also known as immediate hypersensitivities, are commonly associated with allergic reactions such as hay fever, hives, and anaphylaxis. These reactions typically involve the release of histamine and other inflammatory mediators from mast cells and basophils, leading to symptoms like itching, redness, swelling, and mucus production. Clot formation, on the other hand, is not a typical response to Type 1 hypersensitivities. It is more commonly associated with conditions like deep vein thrombosis or certain types of stroke, which involve the coagulation, or clotting, of blood.