[BeauBo]

We know that protection starts building during the second week after the first shot, and that the official effectiveness numbers are a snapshot, two weeks after the second.

It may continue improving a bit beyond then, and may decline at some rate, to some degree, sometime afterwards (or not). That has not been definitively measured, to my knowledge.

[Paul R.]

Ah, OK, with the protection as good as "snapshot" 2 weeks after the 2nd shot, well, I should have been in REALLY good shape this morning. (Went into what I thought might be a slightly "iffy" environment, turned out it was likely less so than had been told to me. Long story, and I have yard work to do to beat t-storms coming in!)

Thanks.