这个致命的传染病,曾夺走了数百万人的生命,并带来许多苦难。 但是WHO展开根除天花的计划,服务范围无远弗届;只要有人居住的地方,都有专人将牛痘疫苗送达该处。
Smallpox had caused millions of deaths and much suffering for centuries, but once the agency set out to eradicate it, WHO personnel traveled the world to conduct a massive vaccination program.
将近一个世纪,疫苗病毒(称牛痘)从手臂到手臂、从一个人身上转移到另一个人身上,问题是如何找到提供大量疫苗的方法,这个问题最终通过在牛胁腹部种植疫苗病毒的办法解决了。
The problem was to discover how to provide large amounts of vaccine. This was eventually solved by growing the vaccine virus on the flank of cows.
But unlike the Cowpox virus, vaccinea, that we talked about before, this is the real disease causing agent.
但是同我们之前曾讨论过的,牛痘病毒疫苗的不同之处在于,这是可以直接致病的病毒
Vaccination from cows, and that's where the first vaccine came from.
从牛身上获取牛痘疫苗,这是疫苗首次亮相
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