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May 13, 1955
Six more cases appear; two cases previously thought to be paralytic are proven non-paralytic; total of 73 cases of post-inoculated poliomyelitis virus.
The U. S. National Archives and Records Administration at Atlanta, 5780 Jonesboro Road, Morrow, GA 30260, www.archives.gov/
“#12 POLIOMYELITIS SURVEILLANCE REPORT ,” The Global Health Chronicles, accessed August 15, 2020, https://globalhealthchronicles.org/items/show/5409.