The US is amassing an army of contact tracers to contain the covid-19 outbreak. But they'll face major challenges. | MIT Technology Review

The US is amassing an army of contact tracers to contain the covid-19 outbreak. But they'll face major challenges. | MIT Technology Review: Dozens of US states are hiring and training contact tracers to combat the coronavirus pandemic. But high case counts, low testing capacity and other challenges could undermine their effectiveness.