Paul Randal shares some wisdom on corruption:
We’ve had a few new clients come to use recently after experiencing corruption, and they’ve been worried about whether physical corruption can propagate to secondary databases (like an availability group secondary or log shipping secondary) through the mechanism used to maintain the secondary database in sync with the primary database. I explained how it’s very rare for that to happen, but sometimes it does, and not in a way you’d think. Read on…
I don’t even have to ask you to read on; Paul has even done that. And do read the comments as well.