Viruses like Hepatitis C, Hepatitis B, and HIV require transmission through a barrier and pose no threat if merely sitting on a table or floating in the air.

“there are certain viruses that are totally useless floating around the air right there are certain viruses you know the viruses that most people are really afraid of you know Hep C hepb HIV well you know if they're sitting on a table or floating around the air they're of no threat to you they have to be you know sort of transmitted through the barrier”