The COVID-19 testing system has been overwhelmed by the Omicron variant, making it impossible to know how many people are infected. Testing for the virus in wastewater could help plug the gap. But how does it work? Where is it being used? And how can it inform public health policy?
People should prepare for an unpredictable month as the Omicron variant of COVID-19 outpaces the ability of public health officials to test and report cases, but the turn of the calendar could signal better days ahead, experts say.