Financial and economic costs (USD^a) per person treated per year in each district.

aUSD: US Dollars. bCDTI: Community-directed treatment with ivermectin. cData from Kpandai district reflect a combination of annual (in 61 of 76 (80%) of the communities in the sampled sub-district) and biannual treatment frequency (see Table 1 and main text). dCDD: Community Drug Distributor. eEconomic costs include financial costs (monetary transactions) and estimates of the monetary value of goods or services for which no financial transaction has taken place (for example, the opportunity cost of the CDDs' time donated to administer ivermectin rather than working their fields) [18].