In a follow-up on the first polio outbreak seen in Papua New Guinea in two decades, health officials reported three new cases of circulating vaccine-derived poliovirus type 1 (cVDPV1) in the past week–one each from Enga, Eastern Highlands and Madang provinces, with onset of paralysis on 6 August, 29 August and 6 September, respectively.
This brings the total number of cases in 2018 to 18.
Two cVDPV1-positive environmental samples were reported in the past week, from Port Moresby, both collected on 5 September.
Elsewhere, one new case of cVDPV3 was reported in the past week, from Middle Shabelle, Somalia, with onset of paralysis on 7 September and three cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) are reported from Niger, genetically linked to a cVDPV2 in Katsina, Nigeria, with onset of paralysis on 31 August, 6 September and 7 September, all from Zinder province. The total number of cVDPV2 cases in 2018 is six, all from Zinder province. These cases are all linked to the cVDPV2 outbreak in Jigawa, Nigeria.
In Afghanistan, one wild poliovirus type 1 (WPV1) case was reported in the past week, with onset of paralysis on 1 September from Hilmand province. The total number of WPV1 cases Afghanistan in 2018 is 16.
Including four cases reported in Pakistan, twenty WPV1 cases have been reported in total in 2018.
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