Type I hypersensitivity reactions are immediate and mediated by immunoglobulin (IgE) antibodies. The antigen—such as allergens like pollen and dust mites—allow IgE antibodies bound to mast cells and basophils to cross-link with vasoactive mediators. Examples of type I hypersensitivity reactions include allergic anaphylaxis like asthma, hives, food allergies, and hay fever.
Review important information about the causes, diagnosis, and treatment in this short video.
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