Italian epidemiologist Pier Luigi Lopalco has recommended that vaccinated Italians shun the unvaccinated at Christmas, saying they should not invite them to their homes for Christmas dinner. Lopalco, who serves as a Professor of Hygiene and Preventive Medicine at the University of Pisa, stated that fully vaccinated Italians should privately enforce their own version of the country’s vaccine passport, known as the Green Pass, at Christmas gatherings. “I call it the Green Pass for small social circles. If it is an invite from me, the unvaccinated do not enter. If I am the guest, I make sure that the guests...