Medical workers, volunteers engaged in epidemic prevention, control amid summer heat in Henan (9)

A medical worker takes a swab sample for a COVID-19 test at a testing site on the square of Zhengzhou East Railway Station in Zhengzhou, central China's Henan Province, Aug. 3, 2021. Amid the summer heat, medical workers and volunteers have been engaged in epidemic prevention and control citywide to curb the lastest resurgence of the COVID-19 in Zhengzhou. (Xinhua/Xu Yanan)