An empty intersection is seen from an aerial view in Ho Chi Minh City, Vietnam on July 22, 2021. Vietnam's southern metropolis Ho Chi Minh City has tightened restrictions with a curfew order starting from Monday evening to contain a surge of COVID-19. (Photo by Huu Khoa/AP Photo)





A delivery man rides a scooter on a quiet street in Vung Tau, Vietnam, Sunday, July 18, 2021. Vietnam has put its entire southern region in a two-week lockdown starting midnight Sunday, as confirmed daily COVID-19 cases exceeded 3,000 for the third day in a row. (Photo by Hau Dinh/AP Photo)





A man holds a pangolin at Save Vietnam's Wildlife rescue center in Cuc Phuong National Park, Ninh Binh province, Vietnam, June 24, 2021. (Photo by Thanh Hue/Reuters)





This photograph taken on June 8, 2021 shows narrow residential houses, known as “nha ong” in Vietnamese or “tube houses”, in an urban area of Hanoi. Tall, thin and brightly coloured, Hanoi's “tube houses” dominate the city's streets as nine million people compete for space in the bustling capital. (Photo by Manan Vatsyayana/AFP Photo)





This aerial photograph taken on June 8, 2021 shows narrow residential houses, known as “nha ong” in Vietnamese or “tube houses”, in a densely populated urban area of Hanoi. (Photo by Manan Vatsyayana/AFP Photo)





This photograph taken on June 8, 2021 shows a street vendor walking past narrow residential houses, known as “nha ong” in Vietnamese or “tube houses”, in an urban area of Hanoi. (Photo by Manan Vatsyayana/AFP Photo)





This photograph taken on June 8, 2021 shows a man checking his mobile phone against the bacdrop of narrow residential houses, known as “nha ong” in Vietnamese or “tube houses”, in an urban area of Hanoi. (Photo by Manan Vatsyayana/AFP Photo)





Medical workers collecting test samples from residents walk past in Ho Chi Minh City on July 9, 2021, on the first day of the government imposed two-week lockdown as a preventive measure to stop the spread of the COVID-19 coronavirus. (Photo by Huu Khoa/AFP Photo)





People are turned away at a checkpoint at an entrance to Hanoi, Vietnam, Saturday, July 24, 2021. Vietnam announced a 15-day lockdown in the capital Hanoi starting Saturday as a coronavirus surge spread from the southern Mekong Delta region. (Photo by Hieu Dinh/AP Photo)





A scrap dealer carries stacks of plastic waste on his make-shift motorcycle-cart in Hanoi on August 13, 2021. (Photo by Nhac Nguyen/AFP Photo)





A health worker wearing personal protective equipment (PPE) collects swab samples from a woman (C) for Covid-19 coronavirus testing in the Old Quarter in Hanoi on August 11, 2021, amidst the government imposed two-week lockdown to stop the spread of the Covid-19 coronavirus. (Photo by Manan Vatsyayana/AFP Photo)





A health worker wearing personal protective equipment (PPE) waits to collect swab samples from residents for Covid-19 coronavirus testing in Hanoi on August 20, 2021. (Photo by Nhac Nguyen/AFP Photo)





An army soldier checks identifications at a COVID-19 lockdown checkpoint in Ho Chi Minh City, Vietnam, Monday, August 23, 2021. Vietnam's largest metropolis Ho Chi Minh City has enabled a strict lockdown order to help curb the recent outbreak of the pandemic. (Photo by Vu Tien Luc/VNA via AP Photo)





Vietnamese soldiers look out from a truck as they deliver food in strict lockdown areas amid the coronavirus pandemic in Ho Chi Minh City, Vietnam on August 24, 2021. (Photo by Reuters/Stringer)





U.S. Vice President Kamala Harris lays flowers at the Senator John McCain memorial site, where his Navy aircraft was shot down by the North Vietnamese, on the three-year anniversary of his death, in Hanoi, Vietnam, Wednesday, August 25, 2021. (Photo by Evelyn Hockstein/Pool Photo via AP Photo)





Fourth grader Han Binh Cuong attends a lesson via virtual classroom in Hanoi, Vietnam Monday, September 6, 2021. Over 20 million Vietnamese students start a new school year on Monday, many of them on virtual classrooms as more than half of the country is in lockdown to contain a COVID-19 surge. (Photo by Binh Huy/AP Photo)





A man picks up food delivery at a checkpoint of a street cordoned off for the lockdown order in Vung Tau, Vietnam Monday, September 6, 2021. (Photo by Hau Dinh/AP Photo)





A policeman hands back the travel permit to a commuter after checking at a street checkpoint in Vung Tau, Vietnam on Monday, September 6, 2021. (Photo by Hau Dinh/AP Photo)





A man (C) receives the AstraZeneca Covid-19 coronavirus vaccine in Hanoi on September 10, 2021. (Photo by Nhac Nguyen/AFP Photo)