So can I get a show of hands how many of you in this room
have been on a plane in this past year?
That's pretty good.
Well, it turns out that you share that experience
with more than 3 billion people every year.
And when we put so many people in these metal tubes
that fly all over the world,
sometimes, things like this can happen
and you get a disease epidemic.
I first actually got into this topic
when I heard about the Ebola outbreak last year.
And it turns out that although Ebola spreads through
these more