Aim for the head; a Zombie Poem

They stumble along
Aimless in direction
They plague the planet
Covered with infection

They hunt for living
Survivors who have fled
Then feast on their flesh
So they become undead

Their populous grows
With every dead soul
The infection grows
Beyond human control

They cannot be stopped
By any normal means
They keep on going
Relentless like machines

Only one weakness
You must aim for the head
Destroying the brain
Is all that makes them dead