Fig. 1From: A cluster randomised controlled trial of two rounds of mass drug administration in Zanzibar, a malaria pre-elimination setting—high coverage and safety, but no significant impact on transmissionUnguja Island, Zanzibar. The map highlights the 16 shehias included in the study. Shehias randomised to the control arm are shaded in red, and shehias randomised to the intervention arm are shaded in greenBack to article page