One of the things the first half of "The Walking Dead" Season 7 left wide open was the fate of Heath.
We last saw the character on the road with Tara, getting swarmed by a heard of walkers. Tara never found her friend. Though, it appeared Heath either made it away on his own or was taken by someone(s) with a vehicle.
Heath could be a walker now or may be a prisoner of the Saviors. Either way, don't expect an answer anytime soon, maybe ever.