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Diseases (Prevention (Secondary Prevention (Diagnosis/Intervention, In…

- - - - Chemical mediators cause blood vessels to dilate and allow phagocytes to leave the blood and go to the tissues
  - - - Passive (Antibodies from someone else)
      - Active (Vaccination
- - - - factors that affect the agent and opportunity for exposure
        
        Contaminated objects
        
        Consuming food and drink
        
        Direct contact with infected people
    - - Human who gets the disease
    - - Pathogen
        
        Viruses
        
        Protozoans
        
        Bacteria
        
        Fungi
- - - - Onset of Symptoms
        
        Stage of Clinical Disease (Usual Time of Diagnosis)
        
        Stage of Recovery, Disability, or Death