Clinical trials in multiple sclerosis
Mar. 16, 2020
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Full spectrum of neurology in 1,200 comprehensive articles.
A total of 91 cases of wild poliovirus type 1 (WPV1) and 71 cases of vaccine-derived poliovirus type 2 (VDPV2) were reported from January 2016 to July 2020, with a marked exacerbation in 2020 (data as of August 29, 2020). Abbreviations: aVDPV2 = ambiguous vaccine-derived poliovirus type 2; cVDPV2 = circulating vaccine-derived poliovirus type 2; WPV1 = wild poliovirus type 1. aVDPVs are isolates with no evidence of person-to person transmission or from persons with no known immunodeficiency; cVDPVs are isolates for which there is evidence of person-to-person transmission in the community. (Source: U.S. Centers for Disease Control and Prevention. Martinez M, Akbar IE, Wadood MZ, Shukla H, Jorba J, Ehrhardt D. Progress toward poliomyelitis eradication - Afghanistan, January 2019-July 2020. MMWR Morb Mortal Wkly Rep 2020;69(40):1464-8.)