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Hi, Dr. Mo here with JA. Please let me review the information and I'll reply shortly.
Did he have any visible blood on his hands? Any cuts on him?
If there was no blood and he washed his hands then the chance of Hep C transmission is zero.
You cannot transmit HIV in that fashion.
That's a healed cut and so the chance of transmission of any disease is zero.
Your cut is nearly completely healed. If his was 3 days ago then there is no concern.
Yes, you are safe to resume sex with your wife without any protection.