HIV spread among men traced

Scientists have made a key discovery in pinpointing how HIV is transmitted in men who have sex with men.

The researchers hope that by better understanding how HIV spreads during human sex, that they'll be better able to stop the epidemic.

"By knowing the origin of the transmitted virus, scientists may be able to develop new vaccines, vaginal microbicides and drugs to prevent the spread of sexually transmitted HIV," study author Dr. Davey Smith, an associate professor of medicine at the University of California San Diego, said in a release.

Semen is made up of sperm, white blood cells and the fluid around these cells, known as seminal plasma.

Read more: http://www.cbc.ca/health/story/2010/02/11/hiv-transmission-semen.html#ixzz0fQMQF0nP