To the first question, unless you cut your hand you would have an infection by now due to the trash not by the peanut crumbs etc. If not cut and no infection (redness, swelling, pain, fever. You are fine. As to the second question, you have no exposure.
mkh9
Wow what kind of friends do u have are they contagious.
No you have nothing to worry about in either case.
Have a good day.
mkh9