Fig. 2

Temporal trends in therapeutic coverage (%) of ivermectin treatment for the eligible Yanomami population in the Venezuelan part of the Amazonian focus. From 1993 through 1999, treatment was distributed annually by mobile teams. In 2000 treatment frequency was increased to twice per year and in 2009 to four times per year. a Coverage of annual and twice per year treatment. b Coverage of three-monthly treatment since 2009 (black, grey, hatched and dotted bars indicate, respectively, the therapeutic coverage in the first, second, third and fourth quarters of the year). The red horizontal line at 85 % in both (a) and (b) indicates the minimum coverage of eligibles that needs to be reached and sustained to interrupt transmission according to OEPA’s strategy