Poliovirus invades the central nervous system and can cause total paralysis in hours.

脊髓灰质炎病毒入侵人体的中枢神经系统，有可能在几小时内就导致瘫痪。

A mutated strain of poliovirus has been reported in more than 30 countries.

还有30多个国家都出现了一种脊髓灰质炎病毒变异株。

Poliomyelitis, or polio, is a paralyzing and potentially fatal infectious disease caused by the poliovirus.

脊髓灰质炎（又叫小儿麻痹症）是一种由脊髓灰质炎病毒引起的传染病，这种疾病能够使人瘫痪，甚至可能致死。

The GlobalPolio Initiative says the plan is the first that aims to eradicate all types of polio—the wild poliovirus and vaccine derived cases.

全球小儿麻痹症组织倡议计划的主旨是要根除所有类型的脊髓灰质炎—脊髓灰质炎病毒野毒株及疫苗衍生病症。

The poliovirus was most contagious during the hot months and struck tens of thousands of children every year, almost 60,000 in 1952 alone.

脊髓灰质炎病毒在炎热的月份传染性最强，每年感染成千上万的儿童，仅在1952年就将近感染了六万。

And these include the herpesviruses and HIV, while the ones that lack the envelope such as poliovirus are called non-enveloped or " naked" viruses.

其包括疱疹病毒、人类免疫缺陷病毒（HIV）；而缺乏囊膜的病毒，如脊髓灰质炎病毒，被称为无囊膜病毒或裸病毒。

Health officials say on rare occasions, the live, but weakened poliovirus in the oral vaccine may genetically alter in the immunized person's gut triggering the disease.

卫生官员称在极少数情况下口服疫苗中存活但被削弱的脊髓灰质炎病毒可能在免疫人群的肠道中改变引发疾病。

A PCR test begins by collecting a sample: this can be blood for hepatitis viruses, feces for poliovirus, and samples from the nose or throat for coronaviruses.

PCR 测试从采集样本开始： 这可以是肝炎病毒的血液、脊髓灰质炎病毒的粪便以及冠状病毒的鼻子或喉咙样本。