I helped a homeless man move personal items with papercuts on my hands. any noticeable or unnoticeable disease risk? hands might have touched his hand

This is something: I wouldn't spend another second worrying about. The risk of things you might be worried about--HIV, hepatitis--can not be transmitted that way. Scabies, and other skin diseases, might be transmitted by skin but not just a touch of a hand. Please don't let unfounded fear keep you from doing humane, kind things in the future. Thank you. Bless you:)