one is the example of smallpox,

其中一个例子是天花
and the second is the example of polio.

另一个是小儿麻痹症
Talk about how vaccines were developed in these particular situations,

谈谈在这些特殊的情况下疫苗如何发展的
and how the development of the biology is

生物学的发展是如何
coupled with delivering this through populations,

与对公众分发疫苗相结合的
and how these sort of intricately woven together.

而它们又是如何错综复杂地接合的
It's not enough to understand the biology

仅仅知道疫苗制造的
of how to create a vaccine,

生物学原理是不够的
if you can't make enough of the vaccine or

还得能生产出足够的疫苗
deliver it to people in ways that it's useful.

并在公众中广泛使用
And so we'll talk about how that happened in the—

所以我们会以天花和小儿麻痹症为例
using the examples of smallpox and polio.

讨论上述目标是如何实现的