The cluster size is based on the typical size of a rural village (250-500 people) from previous experience in Malawi. Using 2010 DHS data, baseline rates for individuals tested in the last 12 months is estimated at 25% to 40%, with a 45% to 60% predicted effect size in the intervention arm compared to the control arm. Baseline coverage for individuals who have ever tested is estimated at 42% to 60% with predicted effect size 30%-45%.