In a May 2006 file photo, Gilead Sciences Inc. Chief Executive John Martin holds a Truvada pill bottle in a lab in Foster City, Calif. Scientists have an exciting breakthrough in the fight against AIDS. Daily doses of Truvada, a pill already used to treat infection with HIV, the virus that causes the disease, helped prevent healthy gay men from catching it through sex with an infected partner. In a study of gay and bisexual men in six countries, the pill, Gilead's Truvada, cut the risk of infection by 44 percent when given with condoms, counseling and other prevention services. Men who took their pills most faithfully, at least 90 percent of the time, had even more protection _ 73 percent. (AP Photo/Paul Sakuma, File)
Read the article: Study: AIDS pill helps gay men avoid HIV infection
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