Macao carries out mass COVID-19 testing (4)

A medical worker takes a swab sample from a resident for COVID-19 nucleic acid testing in Macao, south China, Aug. 4, 2021. The mass testing, started from 9:00 a.m. local time Wednesday, is expected to be completed within three days, according to the Novel Coronavirus Response and Coordination Center of Macao. (Xinhua/Cheong Kam Ka)