How do you change playermodel face on team change?

I'm currently working on an infection type game and I need help changing the face on the playermodel once you get switched to the infected team.

local faceId = "http://www.roblox.com/asset/?id=501885626"


game.Players.PlayerAdded:Connect(function(player)
	player.Changed:Connect(function(att)
		if att == "Team" then
			local char = player.Character or player.CharacterAdded:Wait()
			local head = player:WaitForChild("Head")
			local decal = head:WaitForChild("face")
			local desc = game.Players:CreateHumanoidModelFromUserId(player.UserId)
			local normalFace = desc.Face
			desc:Destroy()

			if player.Team == game.Teams.Infected then
				decal.Texture = faceId
			elseif player.Team == game.Teams.Survivors then
				decal.Texture = normalFace
			end
		end
	end)
end)

This is the code I have so far. Whenever I am testing and switch to the infected team it outputs Infinite yield possible on 'Players.jackcough62689:WaitForChild("Head")' Any help would be greatly appreciated.