H.I.V. kills CD4 cells, or T-helper cells ? Once the immune system is compromised, a person develops AIDS (acquired immuno-deficiency syndrome) ? H.I.V. is most commonly transmitted by sexual contact with an infected person ? Insect bites and sweat carry almost no risk of transmission ? Studies show that drying H.I.V. infected fluids can reduce viral presence by 90-99% ? There is no vaccine for H.I.V. and no cure for AIDS
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