Volume 24, Number 1—January 2018
Research
Emergence of Vaccine-Derived Polioviruses during Ebola Virus Disease Outbreak, Guinea, 2014–2015
Figure 1

Figure 1. Epidemiologic context for emergence of vaccine-derived polioviruses during Ebola virus disease outbreak, Guinea, 2014–2015. A) Distribution of AFP cases (n = 132 in 2014; n = 113 in 2015) and contacts (n = 0 in 2014; n = 119 in 2015) for each month according to date of first fecal sample collection. Data for Ebola cases accessed at (15). B) Geographic distribution of case-patients (n = 6) and contacts (n = 7) with laboratory-confirmed VDPV2 infection. Outer circles indicate subprefectures; gray circles represent case-patients with paralysis onset in 2015; white circles represent laboratory-confirmed contacts; triangle represents case-patient with paralysis onset in 2014. AFP, acute flaccid paralysis; NPEV, nonpolio enterovirus; OPV, oral polio vaccine; tOPV, trivalent OPV; SIAs, supplementary polio immunization activities; VDPV2, type 2 vaccine-derived poliovirus.
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1These authors contributed equally to this article.