PPT - Epidemiology of Poliomyelitis Ashry Gad Mohamed MBchB, MPH, DrPH Prof. of Epidemiology PowerPoint Presentation - ID:5797728
Polio - Our World in Data
Polio: For health professionals - Canada.ca
Detection of circulating vaccine derived polio virus 2 (cVDPV2) in environmental samples– the United Kingdom of Great Britain and Northern Ireland and the United States of America