I recently had a colonoscopy at the V A Hospital in Danville, Illinois back in 2005 and was called back later to get a blood test because they found out that the machine portion of the unit wasn't sterilized on part of the unit or they found part of the unit wasn't cleaned thoroughly in one area of it and found skin tissue, but anyway they had to call back about 500 of us veterans that recently had the procedure done and be given a blood test to see if we cotracted the HIV or hepatitis.