Effects of COVID-19 on Vaccine-Preventable Disease Surveillance Systems in the World Health Organization African Region, 2020 by John Paul Bigouette, Anna W. Callaghan, Morgane Donadel, Angela Montesanti Porter, Louie Rosencrans, Jacquelyn S. Lickness, Sara Blough, Xi Li, Robert T. Perry, A.J. Williams, Heather M. Scobie, Benjamin A. Dahl, Jeffrey McFarland, Christopher S. Murrill

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