A new German study warns about the economic consequences of another shutdown — and says 2G rules, which exclude unvaccinated people from many public settings, would cost less. The fourth wave of the pandemic is underway in Germany — and there are real concerns that there won’t be enough vaccination coverage to get through winter unscathed. That’s why businesses — and politicians — have been discussing whether the so-called ‘2G rule’ should be enforced. That would mean only vaccinated (geimpft) and recovered (genesen) people could visit many indoor areas such as restaurants, bars and cafes, as well as cinemas and...