Agencies that provide HIV prevention programs (including agencies using sci
ence-based interventions) need to conduct evaluation to facilitate the tran
sfer of effective interventions, provide ongoing assistance to intervention
providers, document services provided, demonstrate effectiveness, and impr
ove programs. The Centers for Disease Control and Prevention (CDC) assists
health departments, community-based organizations, and other CDC grantees w
ith evaluation by providing direct, customized technical assistance and wri
tten guidance Together, these activities assist grantees in conducting eval
uations that provide the information that grantees need as their programs d
evelop.