Board Thread:Episode Discussions/@comment-3125844-20140214200347/@comment-24397663-20140219073609

Even if a Wesen literally jumps Wu right into the face, he won't accept it. It's not in his nature. He'll find other explanations. And the Boys will back up his denying like Nick did with Hank.

Otherwise he would've already noticed with all the weird stuff happening like the Zombie-Attack and himself beeing under a spell that something is going on.