Vurayai Ruhanya, et al. “Recovery of Enteroviruses and Poliovirus in Harare Sewage Using the Bag-Mediated Filtration System at the Introduction of the Inactivated Polio Vaccine in Zimbabwe”. Water SA, vol. 48, no. 3 July, July 2022, doi:10.17159/wsa/2022.v48.i3.3892.