The HIV virus is much weaker than the Hepatitis one. It only survives outside the body for … It is primarily transmitted through unprotected sex both homosexually or heterosexually. However, if drug users are injecting substances into their blood stream they are very vulnerable to protracting it. It only survives outside the body for a short time. Sharing drug using equipment is never a good idea, but under the influence of drugs people often fail to take precautions. Similarly, under the influence of drugs safe-sex is less likely to be practised.