Yes you can. No you can not.
It is a midi sequencer, so if the virus has sucha midi message, I am pretty certain that the MPC can send it. Did you read the midi implementation chart for your virus?? that is the first thing to do right in such a situation. You want to turn off receive control. Not the best way in my opinion. In fact there is a hundred other ways to do it.
First you could copy sequence and take out said PC. solved. Just switch to new copy with out PC and you have no PCÂ second time around the exact same loop.
Another way is copy the bars into same sequence so it doubles in size. again this soves problem with PC as you take out second one.
Another way is to use song mode. Another is in JJOSXL, the other OS for the MPC1000 is pad to PC or can be set to send sysex even at a hit of a pad. This way you can set pad in any bank to send PC. There are many other ways I am sure if i think about it, but can not be assed. So yeah you can if you think about it/