China Reveals Multiple Double Mutant COVID Cases in Country On 5/5/21 at 12:56 PM EDT China has confirmed multiple cases of the "double mutant" coronavirus variant first discovered in India, with three businessmen testing positive following a return from the country last month. The men between the ages of 20 and 30 had been working in a city southeast of New Delhi since 2019, a report said. Despite staying well guarded at their dust-free workplace—a cellphone manufacturing plant in Noida—and donning full protective gear on a brief business trip to Nepal, they tested positive upon arrival in Chongqing in southwestern China on April 21.