Zombie Jammer is a jammer block which, when enabled, a Zombie Jammer will prevent visitors of the world to be infected with the g-Virus, except with direct injection.
The Zombie Jammer glows green when activated. It has a big Z engraved on it, which stands for "Zombie". When activated, it makes a kind-of-whirring-like sound which can be silenced with the wrench. It also puts the "IMMUNE" tagline in green whenever players enter the world, to indicate that they are immune to the g-Virus as long as they are inside the world, or as long as the Zombie Jammer is activated.
- The Zombie Jammer can be set to public, allowing anyone to turn it on and off. To activate one, punch it once, and to deactivate it, punch the jammer again.
- The Zombie Jammer has no effect during a pandemic.