Fig. 1

Average monthly tuberculosis notifications, by zone (per 100 000 population). This figure shows the average monthly tuberculosis (TB) notification rate per 100 000 population by zone as estimated in (a) the facility-based phase, where TB cases were passively diagnosed via routine standard of care practices from May 2018 to January 2019 and (b) the community-based phase, where additional active case finding activities were implemented throughout the study area from February to December 2019. Numbers indicate each zone’s rank (from 1 to 15) based on average monthly TB notification rates during the facility-based phase – with no numbers assigned to zones in which no TB cases were diagnosed during that phase. High-risk zones (outlined in bold) were selected using notifications from the facility-based phase by starting with the zone reporting the highest TB notification rate and including additional zones with the next-highest rates until the “high-risk” category accounted for at least 20% of the population, resulting in five zones. Two zones did not have population data available to inform denominators and were thus excluded from this analysis