Taken together, the reports and warnings painted an early picture of a virus that showed the characteristics of a globe-encircling pandemic that could require governments to take swift actions to contain it. But despite that constant flow of reporting, Trump continued publicly and privately to play down the threat the virus posed to Americans. Lawmakers, too, did not grapple with the virus in earnest until this month, as officials scrambled to keep citizens in their homes and hospitals braced for a surge in patients suffering from covid-19, the disease caused by the coronavirus.