Four African countries—Benin, Burkina Faso, Liberia, and Yemen—reported new polio cases this week, all involving vaccine-derived strains, according to the latest weekly update from the Global Polio Eradication Initiative (GPEI).
Three of the four countries reported circulating vaccine-derived poliovirus type 2 (cVDPV2). Benin reported one case from Northern province, marking its first of 2021. So far, all of its cases are linked to Nigeria’s Jigawa outbreak. Burkina Faso also reported one more case, which involves a patient from Bobo and is counted in the country’s 2020 total, now at 62. The country is experiencing different outbreaks, including ones linked to events in Nigeria and Toto. Also, Liberia reported a cVDPV2 case from Bong county, its second so far.
Meanwhile, Yemen reported a circulating vaccine-derived poliovirus type 1 (cVDPV1) case, which affected a patient from Saadah, bringing the total so far this year to two.