The scope of analysis included USAID-supported MDA campaigns in nine West African countries and Cameroon from 2007 to 2020 (Table 2 ). The sample included 3,880 USAID-supported MDA campaigns across 647 districts and 102 regions within the 10 countries studied (Fig 1 ), as defined by June 2021 geographic listings. Each district conducted between 1 and 12 MDA rounds (mean 3.94; SD 2.31). Epidemiological coverage averaged 72.6% (SD 14.0). The MDAs detailed in Table 2 are considered district-specific events. Because Table 2 data reflect redistricting (i.e., reclassifying historical data in terms of 2021 district boundaries maintained within the USAID NTD database) and the exclusion of non-USAID supported MDAs, totals may differ from country- or WHO-maintained data sources. Table 2 is presented as a research sample description and not an authoritative record of country LF MDA history. Across all years, MDA implementation favored the months of April, May, June, and July, together accounting for 61.7% of all implemented MDAs. MDAs were implemented the least frequently in the month of October (2.4% of MDAs) likely due to MoH preference and the transition of the USAID fiscal year.
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