Human Health and Disease

Health,Pathogens, Common diseases


  • Health is defined as the state of complete mental, physical and social well being and is not only absence of disease.
  • Disease is defined as any physical / functional change from the normal state that causes dis comfort, dis ability (or) impairs the health of a living organism. A disease is caused by a disease agent. [Eg. Biological, chemical, physical, mechanical etc;]

Part-1: Watch this video for the topic from 0:58 to 20:58

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