Move through the room until you find a set of double doors; this door is going to open and lots of goons are going to come out, so either take cover or throw your grenades and hide. In any case get rid of them, as per usual, and move straight ahead until you find a room labelled ‘Laboratory’ on your left. Be aware that the place will be absolutely filled with Black-ops, so you need to watch your step. Pick up everything on the table, after you’ve eliminated everyone, and get ready for more fighting as you move on.
When you get to the windows, by the broken vending-machines, ops will start firing from downstairs: do what’s necessary and jump down. Activate the elevator and wait (guys will still attack you). Once the door’s open get in and activate the panel (E key). They’ll soon realise your tricks and stop the elevator, but it will stop mid-floor; crouch and get into the shaft underneath. You’ll need to locate a lift that works as a result though (new objective).
Head straight then right, through the broken glass-doors, and keep moving ahead. You’ll need to find a key-card to enter the morgue (look for a ‘Patient’s Room’).