Shenzhen reported 19 new locally transmitted COVID-19 cases yesterday.Ten new cases were found among quarantined close contacts of COVID patients reported earlier in the city,while the other nine were detected during the routine COVID-19 tests in key areas and among key groups of people.All of the new local patients have been transferred to the emergency wards of the Third People's Hospital of Shenzhen for treatment. They are all in stable condition.The authorities are tracking all close contacts and secondary close contacts of the patients, and those who have been identified have been placed under quarantine.Residents are reminded to take good precaution measures including wearing a face mask, washing hands frequently, maintaining good ventilation and observing social distancing.