The United States on Thursday passed the grim milestone of 4 million confirmed coronavirus infections, and President Trump announced he was canceling the public celebration of his nomination for a second term, as institutions from schools to airlines to Major League Baseball wrestled with the consequences of a pandemic still far from under control.

The rapid spread of the virus this summer is striking, taking just 15 days to go from 3 million confirmed cases to 4 million. By comparison, the increase from 1 million cases to 2 million spanned 45 days from April 28 to June 11, and the leap to 3 million then took 27 days.

Read the rest of the story at The Washington Post