Nondrug measures slowed COVID-19 spread without lockdown, analysis findsPhysical distancing, enhanced screening, and quarantining of people with confirmed or suspected COVID-19—without a lockdown—reduced the spread of the novel coronavirus outside of a hard-hit South Korean province by up to 34%, results of a study published yesterday in Emerging Infectious Diseases suggest.The researchers analyzed data from local public health authorities from before South Korea implemented enhanced community screening and testing on Feb 23 and mandated physical distancing in mid-March and after they began to relax these measures on Apr 19.