How risky is dried blood? I'm in acute phase and my sis. Used nail clipper 24 hours after me and she had a cut next to the finger.

Acute phase of WHAT? Acute phase of WHAT disease? If the dried blood is your own then, I don't see what the problem would be if it were in contact with a fresh cut or wound on yourself. DRIED BLOOD usually doesn't present a risk to patients, only fresh blood when it's contagious. Please send further questions to me at: Use Key Code: PDXFNR. I'd be happy to help with other concerns.