Setting and timeline.
conjunctival
Amhara is administratively divided into 156 districts (locally known as “woredas”), which themselves make up 10 administrative zones. Because the SAFE strategy was scaled up over a period of 5 years, it took approximately 5 years to survey all districts for impact. The first round of impact surveys was conducted between 2011 and 2015 and included conjunctival swabbing for 