In this photo released by Xinhua News Agency, residents wearing masks line up for COVID-19 vaccination at the Jingcheng Hospital in Ruili city in southwestern China's Yunnan Province, April 1, 2021. The Chinese border city hit by a fresh outbreak of COVID-19 this week began a five-day drive Friday to vaccinate its entire population of 300,000 people. (Photo by Chen Xinbo/Xinhua via AP Photo)
