The three social causes elLans and Arlow Tsai arrive at the Wroug center for Infectious Containment. It is a beautiful place to stand on a pretty nice day. There are sterilizing treads all around to walk on. The ground slopes up to form privacy at the entrance. All anyone standing here will see is pleasant ground greenery and wonderful vistas of the sky.
The three elLans carry Arl down into the sloping entrance walkway.
Some Wroug drones flutter lazily overhead. Those drones see the elLans and the alien enter the facility.
Those drones also have a superb view of the larger landscape.
The ground drops down in all directions past the ground privacy wall. Ringing the entrance area are a very large number of sterilization cannons, fast tracking lasers and microwave projectors, canister launch dissolving gels arrays. It really does make you wonder what kind of infection/infestation organisms would need this level of "sterilization".
Even the Wroug that are alive do not know why it is designed this way, by the Wroug civilization that crashed a long, long ago. They just build these things to the designs they have (from way back then).