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A PSU [polio surveillance unit] report that includes age distribution analysis, special studies, and more information on polio-like diseases. This week recorded the highest level of cases reported.
The U. S. National Archives and Records Administration at Atlanta, 5780 Jonesboro Road, Morrow, GA 30260 www.archives.gov/atlanta
“ #40 POLIOMYELITIS SURVEILLANCE REPORT,” The Global Health Chronicles, accessed April 5, 2020, https://globalhealthchronicles.org/items/show/6282.