Nonetheless, during the pre-Ebola period, only four counties (26%) in Liberia failed to reach the target NP-AFP rate; during the Ebola period, the number increased to 10 counties (66%), including the larger counties of Bong, Lofa, and Margibi where the population of children aged < 15 years is well above 100,000 (Table 1). Here, AFP is linked to Ebola hemorrhagic fever.