Dr. Quinn, Medicine Woman - Season 5 Episode 12 : A Place to Die 1998

When three people die after coming in contact with something in the clinic, and one is deathly sick, Dr. Mike, Sully, Colleen, and Andrew but their heads together to find out what it was. They figure out that it was something in the clinic and now it is everywhere. In her case, on the instruments, the sheet. The only solution is to burn everything. When that is done, some are genorous enough to give Dr. Mike some of there things, but they are scared to come in. When Sully must get stitches, and lives after being treated by Dr. Mike, she begins the road to being reaccepted by Colorado Springs.