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世衛(wèi)開始使用新的疫苗來預(yù)防小兒麻痹癥Hints:Rod Curtis Genevabivalent vaccinetrivalent vaccinetype Itype IIIpolioCarol Pandak AfghanistanNigeriaPakistan Rod Curtis at the World Health Organization ...

世衛(wèi)開始使用新的疫苗來預(yù)防小兒麻痹癥。Hints:B.O.P.V. (bivalent oral polio vaccine)AfghanistanCarol PandakPolioPlusRotary Internationaltrivalentmonovalent The World Health Organization has begun t...