An Italian town tested all 3,300 residents, found 3% positive and 1.5% asymptomatic. After quarantining them and their contacts, it cut new COVID-19 cases to zero

How one small town at the center of the outbreak has cut infections virtually to zero: test all 3,300 in town, isolate the 3 percent who tested positive. Infection rate 10 days later down to .3 percent. https://t.co/5Tgpa7cCgl pic.twitter.com/qlydmYJ0mM

— Alec MacGillis (@AlecMacGillis) March 18, 2020