When the immune system is weakened,

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When the immune system is weakened, the body
cannot fight off disease.
2
HIV- Human Immunodeficiency Virus

• Causes AIDS
• Retro virus (contains RNA)
• Attacks Helper T-cells
• Came from butchering chimps (mutated SIV)

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HIV Structure
Protein
RNA
Capsid
Reverse Transcriptase
Viral Envelope
4
HIV Replication
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How Do You Get HIV?

• Not Transmitted
• Air
• Sweat
• Saliva
• Insect bites
• Tears
• Urine

• Transmission
• Blood
• Semen
• Vaginal Fluids
• Breast Milk

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• HIV infection leads to AIDS

• HIV reproduces in and destroys T cells.
• Might NOT have symptoms for 10 years!
• AIDS victims do NOT die from HIV they die of
  other diseases

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• When Helper T-Cell count drops below 200 per mm³
  
• Acquired Immune Deficiency Syndrome (AIDS)

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Treatments

• Antiretroviral drugs- reduces HIV in the body
• Expensive
• No cure butMarch 2013 one child was cured!

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HIV/AIDS Statistics (2010)

• World 34 million infected (3.4 million
  children)
• USA 1.1 million infected (1 in 5 unaware)
• Africa 23 million infected