I live in a friend's house about a month. He gave me a towel in his house for me and I wasn't sure that it was washed. He said his friend brought this towel and will take it back when he will come here again. I take a shower and shave my beard everyday with razor (Gilette) and wipe my body and my razor with towel after every shave. My question is can I catch HIV and hepatitis or another viruses since I use my razor and wipe it with this towel everyday? Should I throw that razor away or can I keep using it? Is there any risk of using a razor that way? I wipe my razor because if I don't wipe it and put it in a box it gets rusty.