Because you didn't find it does not mean it's not there.

I did admit that.

I was unsuccessful in finding a vaccine definition in the Act, not that there isn't one, mind you.

I found some pdf's and I think one was of the Act itself. It probably was in there, but could not readily find quotes of it online. I'm technologically-challenged, on a dumb little tablet and can't download much.

the definition of 'vaccine' is there and cannot cannot be changed willy-nilly

I'm glad to hear that. If it does have to be bipartisan and go through both houses, how fast or how slow that happens will say something in and of itself. I guess we'll have to wait and see.....