维基百科上讲述了人们对于hiv的一些错误认识。

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http://en.wikipedia.org/wiki/Misconceptions_about_HIV_and_AIDS
节选：
HIV cannot be transmitted through oral sex？While it is agreed that oral sex has a much lower HIV-infection risk than vaginal and anal sex, HIV can be transmitted through both insertive and receptive oral sex,[23] when there is contact between semen or vaginal fluid and the mucus membranes of the mouth. The risk of infection from a single encounter is small, but it increases with frequency of activity. To date the CDC lists no documented cases of transmission to the insertive partner of such activities.
Transmission risk may be elevated in the case of open sores on the genitals and/or mouth, or significant gum disease or bleeding, i.e., when there is direct contact between semen and breaks in the skin or surface of the mouth.[20]

HIV survives for only a short time outside the body？
HIV can survive at room temperature outside the body for hours if dry (provided that initial concentrations are high),[26] and for weeks if wet (in used syringes/needles).[27] However, the amounts typically present in bodily fluids do not survive nearly as long outside the body—generally no more than a few minutes if dry.[20] Again, the amount of time is longer if wet, especially in syringes/needles and related equipment.

恐神经了

第二段怎么感觉意思矛盾的。一会说HIV可以离体在室温中生存几小时，干燥的情况下，或者几个星期，湿润的情况下。一会又说体液中的量在体外只能生存几分钟，如果干燥的情况下。
不太懂这意思

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艾滋病病毒是非常脆弱的，离体之后就失去活性，不具有感染他人的能力。还有，不要动不动就引用外文资料，这只属于学术研究范围，不是你们咨询者的事情，知道自己没事就好了！
      艾滋病病毒体外和生活当中不具有感染性！