The coronavirus seems to be in retreat in the United States, with the number of cases across the country down about 25 percent compared with a couple of weeks ago. Hospitalizations and deaths are also falling. So, what stage are we in with the pandemic? And how will developments such as a new antiviral treatment and the availability of booster shots affect things? Guest: Apoorva Mandavilli, a science and global health reporter for The New York Times.