A second WHO region declared polio-free.
Maurice
J
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D002160:Cambodia / Q000453:epidemiology; D002681:China / Q000453:epidemiology; D005202:Asia, Eastern / Q000453:epidemiology; D006801:Humans; D017589:Immunization Programs; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control*; D014944:World Health Organization