The Problem with the "Sign of Peace" in Today's Latin Church
Actually, the traditional liturgical pax in the Latin rite was/is much more hygienic than shaking hands with every person within reach. The wisdom of the ages seen in liturgical directives of the past. The hands never touched in the old exchange of peace.
A bit like the no meat on Fridays, which forced Catholic homes to have the habit of eating fish at least once a week. Kids grew up this way. Today nobody eats fish and kids don't like the taste of it. Eating fish is a hugely important source of omega-3 fatty acids - essential nutrients to keep our heart and brain healthy.