Fig. 1

Overlap between selected onchocerciasis and malaria endemic areas in Africa. a Estimated prevalence of palpable Onchocerca nodules in the 20 African Programme for Onchocerciasis Control countries in 2011 as described by Zouré and colleagues [41]. b Plasmodium falciparum parasite rate in 2–10 years old in 2015 as described by Bhatt and colleagues [42]