San Francisco General Hospital announced this past week that it had no Covid-19 patients for the first time since March 5 of last year.Jim Wilson/The New York Times The United States is adding fewer than 30,000 cases a day for the first time since June of last year, and deaths are as low as they’ve been since last summer. Nearly everywhere, the U.S. outlook is improving. More than 61 percent of American adults have received at least one vaccine shot , and though the pace has slowed, the share is still growing by about two percentage points per week. “I think by June, we’re probably going to be at one infection per a hundred thousand people per day, which is a very low level,” Dr. Scott Gottlieb, former head of the Food and Drug Administration, said Sunday on the CBS show, “Face […]