Further analysis of the data is needed to find out whether the HIV infections were confined to the heaviest users of the microbicide.
32.
Despite setbacks, scientists and people concerned about women's health issues are more optimistic than ever about prospects for a microbicide.
33.
Also, scientists do not want a microbicide to change the acidity of the vagina because it could allow unwanted bacteria to flourish.
34.
Gilead's drug Viread, prepared as a topical gel, is the only licensed antiviral drug being tested as a microbicide.
35.
Second the microbicide would prevent any virus that escapes from attaching to a woman's cells, the way HIV starts to infect.
36.
Although six products are about to enter large-scale trials, Rosenberg predicted that a useful microbicide is still five to seven years away.
37.
British physician Eileen Rubery said efforts have gained momentum over the last two years to develop a microbicide that women could apply before having sex.
38.
Although years of testing remain, it's possible that a microbicide could be available by the end of the decade, she said.
39.
"Unlike vaccines, there has been virtually no private sector investment in microbicide development, " Rosenberg said . " The science is there.
40.
One is in developing a chemical that when inserted in the vagina could act as a microbicide, preventing HIV's entry into the body.
