An alley is blocked with trash can and a Vietnamese flags in Vung Tau, Vietnam, Monday, Sept. 13, 2021. In Vung Tau, just outside Ho Chi Minh city, streets are sealed and checkpoints are set up to control the movement of people. Barbed wire, door panels, steel sheets, chairs and tables are among materials being used to fence up alleys and isolate neighborhoods.(AP Photo/Hau Dinh)