A new, more effective oral vaccine will help.

一种新型更为有效的口服疫苗也将对疫情防治有所帮助。

A different oral vaccine will be introduced next year to prevent this from happening.

明年将推出一种不同的口服疫苗，以防止这种情况发生。

In addition, the oral vaccines are easy to give, requiring only two drops per dose.

此外，口服疫苗容易摄入，每剂只需两滴。

Koprowski's experimentation created the first oral polio vaccine, or OPV, using a live weakened version of the virus.

科普罗夫斯基的实验创造了第一种口服脊髓灰质炎疫苗，OPV，使用的是活的弱化版脊髓灰质炎病毒。

In rare situations, the live virus in the oral vaccine can change into a form capable of causing polio infections.

在罕见的情况下，口服疫苗中的活体病毒可转变为能够引发脊髓灰质炎感染的形式。

All the current cases that came from oral vaccines have been linked to a Type 2 virus contained in the vaccine.

目前所有因口服疫苗导致的病例均与疫苗中含有的一种2型病毒有关。

The vaccine that eradicated polio in the US, the oral polio vaccine, transmits between people.

在美国根除小儿麻痹症的疫苗，即口服小儿麻痹症疫苗，会在人与人之间传播。

Medical researcher Jonas Salk developed the first vaccine. Albert Sabin later created an oral vaccine.

医学研究员 Jonas Salk 开发了第一种疫苗。 阿尔伯特·萨宾 (Albert Sabin) 后来发明了一种口服疫苗。

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。

In the early 2000s, vaccines known as bivalent oral vaccines were developed to target only PV1 and PV3 because of the drop in circulation of the PV2 strain.

在 21 世纪初，由于 PV2 毒株的传播减少，开发了仅针对 PV1 和 PV3 的二价口服疫苗。