One imported confirmed case of COVID-19 was reported in southwest China's Yunnan Province on Thursday, local authorities said Friday.
The patient, a native of Kunming City, capital of Yunnan Province, arrived in Chengdu, capital of China's Sichuan Province on Sept. 29 from Manila, the Philippines, and was diagnosed as an asymptomatic carrier after testing positive for the virus.
The carrier then received medical treatment for 56 days in Chengdu. After four nucleic acid tests gave negative results, the case was transfered to a designated hotel in Chengdu for another 16-day quarantine.
After being released from medical observation on Dec. 10, the case took a flight to Kunming on Dec. 11, and was diagnosed as a confirmed COVID-19 case on Thursday after another nucleic acid test.
Kunming immediately launched an emergency response and carried out nucleic acid tests on people who were present in and around the places the patient lived and visited. As of 3 p.m. Friday, 2,441 people were sampled and 1,270 nucleic acid tests completed, all of which gave negative results.
Meanwhile, 23 close contacts of the patient were traced through an epidemiological investigation and have been put under medical observation.