At 10 hours in February 24th, the Pinghu City CDC received a letter from the CDC of COVID-19, where the asymptomatic persons infected by the 2 provinces were close to the carriage. The epidemiological investigation and verification were carried out at the first time by the tracing group of epidemic situation in Pinghu City. At present, two close contacts have been isolated and controlled, and the first nucleic acid test is negative. Some activity tracks are announced as follows: Close contact...