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Diseases and Immunity | IGCSE , O Level Biology pptx
This detailed presentation on diseases and immunity covers essential concepts in immunology. It defines pathogens and transmissible diseases, and explains the body′s defence mechanisms—including mechanical and chemical barriers, phagocytosis, and antibody production by lymphocytes. The slides distinguish between active immunity (developed through infection or vaccination) and passive immunity (acquired from another individual), and describe how vaccination stimulates the production of memory cells for long-term protection. Additionally, the presentation discusses the importance of hygiene in preventing disease spread and touches on autoimmune disorders, such as type 1 diabetes. #Immunity, #Vaccination, #Pathogens, #ActiveImmunity, #AutoimmuneDiseases