stuck in black plague - after machine room

[zozza2001]

There's two possible places: computer room and infirmary. There are maps on the wall everywhere and signs wich show you where are the rooms. I reckon that you clear the computer room first!

I've already solved the computer room bit actually...any idea what's next?
thanks!

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cant remember that part too clearly but if im correct you need to use the saw to cut the guys hand off

yeah I think you're right - which guy though? Tried it on the dead body in the hallway...is there anyone else?
thanks