Shanghai tightens COVID-19 control measures amid resurgence

A deliveryman carries daily necessities for residents in Pudong District, east China's Shanghai, March 28, 2022.

China's economic hub Shanghai launched a new round of nucleic acid testing across the city starting from 5 a.m. on Monday, local authorities said Sunday night. (Xinhua/Wu Zhendong)

A medical worker takes a swab sample from a resident for nucleic acid test at a COVID-19 testing site in Pudong District, east China's Shanghai, March 28, 2022.

China's economic hub Shanghai launched a new round of nucleic acid testing across the city starting from 5 a.m. on Monday, local authorities said Sunday night. (Xinhua)

A medical worker takes a swab sample from a resident for nucleic acid test at a COVID-19 testing site in Fengxian District, east China's Shanghai, March 28, 2022.

China's economic hub Shanghai launched a new round of nucleic acid testing across the city starting from 5 a.m. on Monday, local authorities said Sunday night. (Photo by Wang Yanting/Xinhua)

Volunteers carry daily necessities for residents in Fengxian District, east China's Shanghai, March 28, 2022.

China's economic hub Shanghai launched a new round of nucleic acid testing across the city starting from 5 a.m. on Monday, local authorities said Sunday night. (Photo by Wang Yanting/Xinhua)

A vehicle carrying daily necessities ordered by residents is seen in Pudong District, east China's Shanghai, March 28, 2022.

China's economic hub Shanghai launched a new round of nucleic acid testing across the city starting from 5 a.m. on Monday, local authorities said Sunday night. (Xinhua/Wu Zhendong)

A staff member registers information for a resident at a COVID-19 testing site in Fengxian District, east China's Shanghai, March 28, 2022.

China's economic hub Shanghai launched a new round of nucleic acid testing across the city starting from 5 a.m. on Monday, local authorities said Sunday night. (Photo by Wang Yanting/Xinhua)

People line up for COVID-19 test at a testing site in Fengxian District, east China's Shanghai, March 28, 2022.

China's economic hub Shanghai launched a new round of nucleic acid testing across the city starting from 5 a.m. on Monday, local authorities said Sunday night. (Photo by Wang Yanting/Xinhua)

A closed entrance to a ferry is seen in east China's Shanghai, March 28, 2022.

China's economic hub Shanghai launched a new round of nucleic acid testing across the city starting from 5 a.m. on Monday, local authorities said Sunday night. (Xinhua/Ding Ting)

People line up for COVID-19 test at a testing site in Pudong District, east China's Shanghai, March 28, 2022.

China's economic hub Shanghai launched a new round of nucleic acid testing across the city starting from 5 a.m. on Monday, local authorities said Sunday night. (Xinhua)