Innate immunity and defense Mechanism of Our body

To combat foreign invaders such as viruses, bacteria, and fungi, the human body has three primary lines of defense. Chapters: 0:00 | Start 0:06 | First line of defense 3:35 | Recognizing antigen by immune system 4:60 | Delayed Hypersensitivity Reaction Physical and chemical barriers, non-specific innate responses, and specific adaptive responses are the immune system's three lines of defence.