PBA: Yes, everyone has it. But it’s far more dangerous to transfer it to an open wound then it is through normal contact, certainly to someone that young.
DY: I said that identical thing (whether MBP was Davka or just the best way in Chazal’s time) here a few months back.
ygmonsey: Not “all the Gedolim” said it. It was a Machlokes. He felt that he needed to very strongly show which way he held.