Open social support networks did not exist for MSM in Thai Nguyen. Thiscreatesan extra barrier to outreach activitiesin smaller citiesin northern Vietnam, because prevention efforts cannot be coordinated with gay venues. However, men do communicate with each other in Thai Nguyen through friendsand the Internet, so those outlets may be utilized for outreach. Stigma and discrimination were clear barriersto HIV prevention behaviorsin the study participants. More work is needed to reduce stigma in the larger community, and to give MSM strategies to address stigma and cope with stigma.