Medical workers, volunteers engaged in epidemic prevention, control amid summer heat in Henan (10)

Volunteers check citizens' nucleic acid results at the checkpoint of an expressway of 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)