Amid what appears to be an explosive outbreak of COVID-19, China on Wednesday said it would no longer report asymptomatic cases because they've become "impossible" to track after an end to mandatory testing. The now-voluntary testing policy is part of an abrupt pivot away from the country's strict zero-COVID policy that drew widespread protests in recent weeks. After years of keeping SARS-CoV-2 outbreaks largely at bay with various restrictions, mandatory isolations, quarantines, lockdowns, and extensive testing, China last week significantly eased its unpopular policy. The State Council announced on December 7 that residents would no longer be required to undergo...