A sign advising not to shake hands sits in a closed cafe in Essen, Germany. (Photographer: Wolfram Schroll/Bloomberg)
(Bloomberg Businessweek) -- Ever since the novel coronavirus upended the world, people have rushed to predict which norms are gone forever. Chief among them: the handshake, with all its symbolism of sealed deals and sportsmanship. Yet history suggests such physical pleasantries aren’t so easily eradicated.