Hello, so I've heard that Hep C can remain on surfaces for some time, and that you have to bleach it etc. My roommate recently had a nose bleed and used plenty of tissues to stop it, handled those tissues, touched her blood and kept touching everywhere. Now, I didn't see any blood touch these surfaces, but the bloody tissues did. If she's Hep C positive, can I contract it if I touch these surfaces and scratch somewhere until it bleeds?