Figure 1.

Method of identifying and enrolling associates around an initiating case. The clinical research team would begin at the initiate's home, identify a collection of homes within 200 m of the initiate's home, identify homes with an occupant having active fever or history of fever within the past 7 days, and enroll associates only from those homes while bypassing homes without active fever or history of fever. The entomology research team, meanwhile, collected mosquitoes inside and outside the home from all homes within a 200-m radius of the initiating case home regardless of fever history. Once investigations and enrollment of associates were completed in one grouping, the teams would return to the initiating case's home and then identify, using the aerial map, the next grouping of homes moving in a clockwise manner.