Watch this video if you want information on hypersensitivity type one and its related mechanisms. Complete overview of response of the body to allergy is shared in the video. Timeline 0:00 Introduction 0:07 Contents of video 0:15 Definition of hypersensitivity 0:28 Causes of hypersensitivity 1:00 Hypersensitivity reaction are antigen specific. 1:53 Types of hypersensitivity 2:26 Type I hypersensitivity 3:29 Sensitization 4:15 structure of IgE 5:34 Response on subsequent exposure 5:49 Early phase reaction 6:29 Late phase reaction 7:12 symptoms 7:30 Anaphylaxis 8:05 Atopy