To minimize the risk and consequences of international spread of these polioviruses, countries across west and central Africa, particularly those bordering the affected states of northern Nigeria, should enhance surveillance for acute flaccid paralysis (AFP), identify subnational population immunity gaps, and strengthen routine immunization with trivalent OPV.
弊 繁? 荤 恩 甸? 捞 茄? 笼 俊 混?WHO WHO