That’s my guess too. And it involves the Governor.
He miraculously survived that roomful of zombies without getting any infectious bites or scratches???
Then he bites off Merle’s fingers like a ravenous dog...
He’s infected but his immune system is winning, or at least losing slower that most.
Yeah and remember his daughter - seems there may have been some human left in her...
And I agree - the Guv is just too good a character to kill off yet!