I like the imagery you just created - Waldo with his red and white striped hat and shirt hiding among a bunch of blood vessels. Tricky little bugger. The search continues.
I can't tell you where he's hiding but as a (maybe) day brightener I can tell you that Waldo only had that name in the US and Canada. He has a different name in other countries. My Kids' books call him Wally.
And he's called "Willy" in Norway. We're all looking for him.
Keep up the good fight.