From: Finding inhabited settlements and tracking vaccination progress: the application of satellite imagery analysis to guide the immunization response to confirmation of previously-undetected, ongoing endemic wild poliovirus transmission in Borno State, Nigeria
Year
Unreached u5 children
% of total u5 population
2016
337,411
30.4
2017
157,256
14.2
2016–2017 ∆
180,155