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.