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Hypersensitivity is an increased sensitivity of the body to any substance. Hypersensitivity is an unwanted and excessive reaction of the immune system. This video will tell you about type 4 hypersensitivity, mechanisms and examples of its implementation. Hypersensitivity type 1 • Hypersensitivity type 1 (immediate... Hypersensitivity type 2 • Hypersensitivity type 2 (cytotoc... Hypersensitivity type 3 • Hypersensitivity type 3 (immunoc... Hypersensitivity type 4 • Hypersensitivity type 4 - mechan... Join the VK group: https://vk.com/cor_mdc Author in VK: https://vk.com/ilialarinbe The video does not claim to replace a textbook, lectures and articles. If you have any constructive comments, wishes, clarifications - feel free to write! The author does not claim to know everything, he just wants to help and hopes that he helps.