Live vaccines, such as oral poliovirus vaccine; yellow fever vaccine; and measles, mumps and rubella vaccines, do not contain thiomersal, because it would kill the immunizing component.
一些活疫苗，比如口服脊髓灰质炎疫苗；黄热病疫苗；麻疹，腮腺炎和风疹疫苗并不含硫柳汞，因为后者会杀死免疫成分。
We also administered a challenge dose of monovalent type 1 oral poliovirus vaccine at 7 months and collected stool samples before and 7 days after administration of the challenge dose.
同时，在7个月时给予一剂激发剂量的单价1型口服脊髓灰质炎疫苗，并分别采集给服激发剂量7天前、后的大便标本。
In the meantime, more than 33 000 children were paralysed by wild poliovirus while more than 6.5 million polio cases were prevented by the oral polio vaccine.
这期间，虽然口服脊髓灰质炎疫苗防止了超过650万起脊髓灰质炎病例的发生，但仍有33,000余名儿童因感染脊髓灰质炎野病毒株致瘫。
The spread of a circulating vaccine-derived poliovirus in Nigeria reaffirms that not enough children are protected from poliovirus (wild or vaccine-derived).
传播的疫苗衍生脊髓灰质炎病毒（cVDPV）在尼日利亚的出现，再次证明尚有不少儿童没有得到保护，使他们免遭脊髓灰质炎病毒的侵袭（无论是野生型还是疫苗衍生型）。
In very rare instances, the virus in the vaccine can mutate into a form that can paralyse - this is what is known as a vaccine-derived poliovirus or VDPV.
在极少情况下，疫苗中的病毒可能变异成一种可导致瘫痪的类型，这就是人们所称的疫苗衍生脊髓灰质炎病毒(VDPV)。
A: a vaccine-derived poliovirus (VDPV) is a rare strain of poliovirus, genetically mutated from the strain contained in oral polio vaccine (OPV).
答：疫苗衍生脊髓灰质炎病毒(VDPV)是一种罕见的脊髓灰质炎病毒株，由口服脊髓灰质炎疫苗(opv)里的病毒株遗传变异而来。
A: a vaccine-derived poliovirus (VDPV) is a rare strain of poliovirus, genetically mutated from the strain contained in oral polio vaccine (OPV).
答：疫苗衍生脊髓灰质炎病毒(VDPV)是一种罕见的脊髓灰质炎病毒株，由口服脊髓灰质炎疫苗(opv)里的病毒株遗传变异而来。
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