Think you had a bad day at work?

[--Pete]

Hi,

Here's a quickie for you all; I saw this article and couldn't help but share it. I'm just glad this is not my line of work:

Interesting. It brings up a question that I've long had but never bothered to research.

I understand, more or less, how a prophylactic vaccine works in terms of exposing the immune system to a diminished threat in order to generate a resistance to a greater threat. What I don't understand is how a vaccine works that is administered (as in this case) to someone who has been already exposed to the greater threat. A quick google failed to bring up anything particularly useful, and Wiki let me down.

So, if anyone has a good link or an explanation they are willing to type, I'd appreciate the info.

Thanks.

--Pete