What is an EUA, and what does it have to do with how quickly we get a coronavirus vaccine?

With talk of the possible availability of a vaccine candidate heating up, you might have heard the term Emergency Use Authorization -- or EUA -- all over the news lately. But what is it exactly, and how does it apply to vaccines?

What is an EUA, and what does it have to do with how quickly we get a coronavirus vaccine?
With talk of the possible availability of a vaccine candidate heating up, you might have heard the term Emergency Use Authorization -- or EUA -- all over the news lately. But what is it exactly, and how does it apply to vaccines?