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Update on Vaccine-Derived Polioviruses - Worldwide, January 2016-June 2017.
Jorba J, Diop OM, Iber J, Henderson E, Sutter RW, Wassilak SGF, Burns CC.
MMWR Morb Mortal Wkly Rep. 2017 Nov 3;66(43):1185-1191.
https://www.cdc.gov/mmwr/volumes/66/wr/mm6643a6.htm
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