De Lay pointed to a similar resurgence of HIV infections among gay populations in the US and western Europe, which he said showed the need for constant vigilance.

The report said higher risk unprotected sex among gay men in several countries in western Europe, such as Germany, appeared to be linked to the increasing numbers of new HIV diagnoses among that group.

"It's disturbing because it's this sense that we can never let our guard down as far as prevention, that the epidemic will come creeping back if there isn't this constant attention being paid to it," De Lay said.

(Chinadaily.com.cn via agencies July 30, 2008)