keep the bed, change the mattress (use your own if it fits )
Eg. Lots of people die in hospitals, and some stayed for a few months before they die, ie. a lot of dead people slept on hospital beds. If you go into hospital, do you dare to sleep on their beds? So long as it is cleaned up (in your case: change the mattress of use your own one if the size fits), people don't care how many people died on it.