Countries turn to rapid antigen tests to contain second wave of COVID-19

The World Health Organization reported more than 2 million new cases last week, bringing the total worldwide to 37 million, with more than 1 million deaths from COVID-19.

Countries straining to contain a second wave of COVID-19 are turning to faster, cheaper but less accurate tests to avoid the delays and shortages that have plagued efforts to diagnose and trace those infected quickly.