Organ transplants require Penoxycyline to prevent rejection

[Crow_T]

Recently I popped a lung out of a pirate and stuck it in my colonist, it seems a bit too easy. I think requiring Penoxycyline at a set schedule to prevent organ rejection would be an interesting balanced mechanic. Also, if a colonist was on Peno for an organ transplant the anti-disease effects of Peno could be reduced drastically.