that was good in one shot instead of three shots?

只需接种一次而不是三次会怎么样
Or vaccines that could be transported more easily—

或者令疫苗更易于运输
the hepatitis vaccine that we get is not stable

现在的肝炎疫苗一定要冷藏
unless it's refrigerated.

否则它就不稳定
It's in solution, it's refrigerated,

疫苗需要溶解在水中还要冷藏
and it's very difficult to transport refrigerated vaccines

而将这些冷藏的疫苗运送到
to all the remote parts of the world where you would like to transport them.

世界上所有的偏远地区是十分困难的
And so that very practical consideration turns out to be important

所以如何使疫苗接种更便于
in how we use vaccines in real populations.

实际操作就变得非常重要
So if you could make a hepatitis B vaccine

所以如果你可以开发出这样的乙肝疫苗
that didn't require a shot or that didn't require refrigeration,

它不需注射就能接种或者不需要冷藏
that would be a tremendous advance

这样的巨大进步