Residents in Wuhan braved pouring rain in queues of more than an hour to take part in a government-led exercise to test the city’s 11 million people for the novel coronavirus, a scale health experts describe as unprecedented. Authorities in the central Chinese city, where the global pandemic began last year and whose cases account for more than 80% of the country’s total, started the campaign this week after a cluster of new cases raised fears of a second wave of infections. While Wuhan lifted its 76-day lockdown last month, concerns persist over how many asymptomatic cases – people who show no symptoms but are capable of spreading the virus – there may be. In Wuhan’s Qiaokou district, at the Zirun Mingyuan apartment community where about 10,000 people live, men, women and children stood under umbrellas while elderly residents perched on stools as they waited […]