Of the 69 children with cVDPV in Nigeria as of September 2007, 60 were either unvaccinated or insufficiently vaccinated.
截至2007年9月在尼日利亚被cVDPV感染的69名儿童中，有60名从未接受免疫接种或接种次数不足。
Of the 69 children with cVDPV in Nigeria as of September 2007, 60 were either unvaccinated or insufficiently vaccinated.
截至2007年9月在尼日利亚被cVDPV感染的69名儿童中，有60名从未接受免疫接种或接种次数不足。
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