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HIV and Viruses : - Coggle Diagram

- - - - Without enough T helper cells, the immune system is unable to mount an effective response to infections
        
        Latency period - no symptoms (person may not know they have HIV), lower levels of HIV replication, latency period can be made longer with antiviral medication
        
        Development of AIDS (acquired immune deficiency syndrome) when there are extremely low levels of helper T cells
  - - - People are considered to have AIDS when symptoms of failing immune system begin to show and T helper cell count falls to below 200 cells per cubic millimeter
- - - - Plasma cell
        
        Produces antibodies
      - Memory B cell
        
        Remains in body
        
        Mounts faster and bigger secondary response
  - - - T Helper cell
        
        Stimulate production of plasma cells and stimulate phagocytosis
      - Cytotoxic T killer cell
        
        Kills invaded cells
      - T Memory cell
        
        Remains in body
        
        Mounts faster and bigger secondary response