Most ships have D-D rooms, short for Decompression-Decontamination rooms. It's fairly common for people to pass through D&D before heading off into unknown, undocumented systems.
Other ships may have more or less advanced systems, combining these functions into separate rooms, merging them into the docking hatch itself, etc. However, the D-D room is by far the most common, and thus financially and functionally efficient, solution.