1.   He and other staff workers at the center conducted the survey among men who said they had engaged in unprotected anal intercourse within the last year.

2.   He said that most men do not engage in unprotected anal intercourse, are reducing the risk if they do, and have fewer sex partners.

3.   If a couple he was treating had unprotected intercourse and the woman and her fetus became infected, he said, he and Columbia University could be held liable.

4.   It can be used within five days of unprotected intercourse and, of course, must be done by a doctor.

5.   The Health Project conducted the survey among men who said they had unprotected anal intercourse within the last year.

6.   The study counters, in part, recent studies and news reports suggesting that more young gay men were having unprotected anal intercourse.

7.   They are men who have moved beyond embracing unprotected intercourse as a sexual preference to embrace HIV itself.

8.   Unprotected anal intercourse, an efficient method for transmitting the AIDS virus, is becoming more common.

9.   Because of declines in unprotected anal intercourse, there has been a big reduction in high-risk exposure, Hecht said.

10.   One of the women, who was HIV-negative before meeting Mwai, was diagnosed with the virus just a few months after having unprotected intercourse with him.