Bloomberg: “People around the world might need to practice some level of social distancing intermittently through 2022 to stop Covid-19 from surging anew and overwhelming hospital systems, a group of Harvard disease researchers said Tuesday. Lifting social-distancing measures all at once could risk simply delaying the epidemic’s peak and potentially making it more severe, the scientists warned in an article published Tuesday in the journal Science. The course of the pandemic will depend on questions not yet answered: Will the virus’s spread change with the seasons? What immunity will people have after they’re infected? And does exposure to coronaviruses that cause mild illnesses confer any protection against the pathogen that causes Covid-19?…”