How likely is it that my son will contract PPS (Poor People Syndrome) by touching a hobo on a park bench?

We were gingerly walking through the park yesterday, and all of the sudden I turned and my son wasn't there. I saw him about 50 yards away touching a sleeping hobo on a park bench. I yelled to my son stating, "No, no, no, bad, you don't touch filthy hobo's." I am just curious about my... show more We were gingerly walking through the park yesterday, and all of the sudden I turned and my son wasn't there. I saw him about 50 yards away touching a sleeping hobo on a park bench.

I yelled to my son stating, "No, no, no, bad, you don't touch filthy hobo's." I am just curious about my son's safety now. What are the odds that he has contracted PPS?
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