The biohazard elimination field was marked by pristine white fencing.
The box was marked with a biohazard symbol on the outside.
This one was similar to the other his team found, only there was no biohazard sign, and the serial was in blue.
He admired the security measures, noting that it was impossible for anyone to reach the landmines, unless the biohazard elimination field was down.
It's marked with biohazard signs and a serial.
It appeared harmless despite the biohazard warnings.
It's a feds hospital, wrapped in armor and surrounded by one of those biohazard elimination fields and landmines.