Chapter Overview
This chapter explores health as physical, mental, and social well-being, and describes multiple diseases—infectious, non-infectious, genetic, and deficiency disorders. Key systems include immunity (innate and acquired), vaccines, and societal measures to prevent and manage diseases like AIDS, cancer, drug abuse, allergies, and autoimmunity. :contentReference[oaicite:1]{index=1}
Important Keywords
- Health: Complete physical, mental, and social well-being, not just absence of disease. :contentReference[oaicite:2]{index=2}
- Disease: Abnormal condition affecting body structure or function.
- Pathogen: Disease-causing agent (bacteria, virus, protozoa, fungi, helminths).
- Immunity: Body’s ability to resist disease; includes innate and acquired immunity.
- Vaccination: Introduction of antigen to develop immunity.
- Autoimmunity: Immune response mistakenly attacks body's own cells.
- Cancer: Uncontrolled cell growth forming tumors; metastasis is spread to other tissues.
Detailed Notes
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