A woman receives a vaccine as Vietnam starts its official rollout of AstraZeneca's coronavirus disease (COVID-19) vaccine for health workers, at Hai Duong Hospital for Tropical Diseases, Hai Duong province, Vietnam, March 8, 2021. REUTERS/Thanh Hue

Health workers wait for their turn as Vietnam starts its official rollout of AstraZeneca's coronavirus disease (COVID-19) vaccine for health workers, at Hai Duong Hospital for Tropical Diseases, Hai Duong province, Vietnam, March 8, 2021. REUTERS/Thanh Hue

A doctor looks at the vial before receiving a vaccine, as Vietnam starts its official rollout of AstraZeneca's coronavirus disease (COVID-19) vaccine for health workers, at Hai Duong Hospital for Tropical Diseases, Hai Duong province, Vietnam, March 8, 2021. REUTERS/Thanh Hue

A health worker holds a vial of the vaccine as Vietnam starts its official rollout of AstraZeneca's coronavirus disease (COVID-19) vaccine for health workers, at Hai Duong Hospital for Tropical Diseases, Hai Duong province, Vietnam, March 8, 2021. REUTERS/Thanh Hue

A health worker holds a vial of the vaccine as Vietnam starts its official rollout of AstraZeneca's coronavirus disease (COVID-19) vaccine for health workers, at Hai Duong Hospital for Tropical Diseases, Hai Duong province, Vietnam, March 8, 2021. REUTERS/Thanh Hue

A woman receives a vaccine as Vietnam starts its official rollout of AstraZeneca's coronavirus disease (COVID-19) vaccine for health workers, at Hai Duong Hospital for Tropical Diseases, Hai Duong province, Vietnam, March 8, 2021. REUTERS/Thanh Hue

Health workers wait for their turn as Vietnam starts its official rollout of AstraZeneca's coronavirus disease (COVID-19) vaccine for health workers, at Hai Duong Hospital for Tropical Diseases, Hai Duong province, Vietnam, March 8, 2021. REUTERS/Thanh Hue

Health workers wait for their turn as Vietnam starts its official rollout of AstraZeneca's coronavirus disease (COVID-19) vaccine for health workers, at Hai Duong Hospital for Tropical Diseases, Hai Duong province, Vietnam, March 8, 2021. REUTERS/Thanh Hue

A woman receives a vaccine as Vietnam starts its official rollout of AstraZeneca's coronavirus disease (COVID-19) vaccine for health workers, at Hai Duong Hospital for Tropical Diseases, Hai Duong province, Vietnam, March 8, 2021. REUTERS/Thanh Hue

A woman wears a protective mask as she rides a bike at a market after Hai Duong authorities end 34 days of social distancing amid the spread of the coronavirus disease (COVID-19), in Chi Linh city, Hai Duong province, Vietnam, March 3, 2021. Picture taken March 3, 2021. REUTERS/Thanh Hue

A barber wears a face mask as he works on the street after Hai Duong authorities end 34 days of social distancing amid the spread of the coronavirus disease (COVID-19), in Chi Linh city, Hai Duong province, Vietnam, March 3, 2021. Picture taken March 3, 2021. REUTERS/Thanh Hue

A woman prays at a temple after Hai Duong authorities end 34 days of social distancing amid the spread of the coronavirus disease (COVID-19), in Chi Linh city, Hai Duong province, Vietnam, March 3, 2021. Picture taken March 3, 2021. REUTERS/Thanh Hue

Pilgrims eat at a temple after Hai Duong authorities end 34 days of social distancing amid the spread of the coronavirus disease (COVID-19), in Chi Linh city, Hai Duong province, Vietnam, March 3, 2021. Picture taken March 3, 2021. REUTERS/Thanh Hue

Residents come out to celebrate with national flags and fireworks after Hai Duong authorities end 34 days of social distancing amid the spread of the coronavirus disease (COVID-19) in Chi Linh city, Hai Duong province, Vietnam, March 3, 2021. Picture taken March 3, 2021. REUTERS/Thanh Hue TPX IMAGES OF THE DAY

People wear protective masks as they make rolled rice pancakes after Hai Duong authorities end 34 days of social distancing amid the spread of the coronavirus disease (COVID-19), in Chi Linh city, Hai Duong province, Vietnam, March 3, 2021. Picture taken March 3, 2021. REUTERS/Thanh Hue

Nguyen Hoang Viet, 22 years old, a new military recruit, wearing a face mask amid the spread of the coronavirus disease (COVID-19), holds a bouquet as he attends a ceremony before leaving for military service in Hanoi, Vietnam, February 27, 2021. REUTERS/Thanh Hue TPX IMAGES OF THE DAY

Vietnamese military new recruits wear face masks, amid the spread of the coronavirus disease (COVID-19), as they attend a ceremony before leaving for military service, in Hanoi, Vietnam, February 27, 2021. REUTERS/Thanh Hue

Vietnamese military new recruits wear face masks, amid the spread of the coronavirus disease (COVID-19), as they attend a ceremony before leaving for military service, in Hanoi, Vietnam, February 27, 2021. REUTERS/Thanh Hue

Clients, wearing protective face masks, buy gold at a jewellery shop on God of Wealth Day, which falls on the 10th day of Lunar New Year, as Vietnamese hope buying gold would bring good luck, in Hanoi, Vietnam, February 21, 2021. REUTERS/Kham

Clients, wearing protective face masks, queue up at a jewellery shop on God of Wealth Day, which falls on the 10th day of Lunar New Year, as Vietnamese hope buying gold would bring good luck, in Hanoi, Vietnam, February 21, 2021. REUTERS/Kham

Clients, wearing protective face masks, queue up at a jewellery shop on God of Wealth Day, which falls on the 10th day of Lunar New Year, as Vietnamese hope buying gold would bring good luck, in Hanoi, Vietnam, February 21, 2021. REUTERS/Kham

A man, wearing a protective face mask, shows a gold ring at a jewellery shop on God of Wealth Day, which falls on the 10th day of Lunar New Year, as Vietnamese hope buying gold would bring good luck, in Hanoi, Vietnam, February 21, 2021. REUTERS/Kham

A gold shop employee, wearing a protective face mask, shows a gold buffalo at a jewellery shop on God of Wealth Day, which falls on the 10th day of Lunar New Year, as Vietnamese hope buying gold would bring good luck, in Hanoi, Vietnam, February 21, 2021. REUTERS/Kham

A gold shop employee, wearing a protective face mask, is dressed as the God of Wealth at a jewellery shop on God of Wealth Day, which falls on the 10th day of Lunar New Year, as Vietnamese hope buying gold would bring good luck, in Hanoi, Vietnam, February 21, 2021. REUTERS/Kham

A gold shop employee, wearing a protective mask, is dressed as the God of Wealth at a jewellery shop on God of Wealth Day, which falls on the 10th day of Lunar New Year, as Vietnamese hope buying gold would bring good luck, in Hanoi, Vietnam, February 21, 2021. REUTERS/Kham

A gold shop employee is dressed as the God of Wealth at a jewellery shop on God of Wealth Day, which falls on the 10th day of Lunar New Year, as Vietnamese hope buying gold would bring good luck, in Hanoi, Vietnam, February 21, 2021. REUTERS/Kham TPX IMAGES OF THE DAY

A man eats in a restaurant behind a plastic partition as a measure against the spread of the coronavirus disease (COVID-19) in Hanoi, Vietnam, February 18, 2021. REUTERS/Thanh Hue

A customer pays in a corner shop where a plastic divider is installed as a measure against the spread of the coronavirus disease (COVID-19) at a shop in Hanoi, Vietnam, February 18, 2021. REUTERS/Thanh Hue

Gardeners wear protective face masks as they work at Hoan Kiem Lake amid the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam, February 18, 2021. REUTERS/Thanh Hue

People sit in a restaurant behind plastic dividers as a measure against the sread of the coronavirus disease (COVID-19) in Hanoi, Vietnam, February 18, 2021. REUTERS/Thanh Hue

Customers pay in a corner shop where a plastic divider is installed as a measure against the spread of the coronavirus disease (COVID-19) at a shop in Hanoi, Vietnam, February 18, 2021. REUTERS/Thanh Hue

Women wearing protective face masks as they talk to each other near Hoan Kiem Lake amid the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam, February 18, 2021. REUTERS/Thanh Hue

Gardeners wear protective face masks as they work at Hoan Kiem Lake amid the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam, February 18, 2021. REUTERS/Thanh Hue

Hanoi Archbishop Joseph Vu Van Thien sprinkles ash on head of priest Anthony Nguyen Van Thang during the Ash Wednesday mass to start the Lent at the St. Joseph Cathedral in Hanoi, Vietnam February 17, 2021. REUTERS/Kham

People attend the Ash Wednesday mass to start the Lent at the St. Joseph Cathedral amid the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam February 17, 2021. REUTERS/Kham

People attend the Ash Wednesday mass to start the Lent at the St. Joseph Cathedral amid the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam February 17, 2021. REUTERS/Kham

Priest Joseph Nguyen Van Diem sprinkles ash on woman's head during the Ash Wednesday mass to start the Lent at the St. Joseph Cathedral amid the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam February 17, 2021. REUTERS/Kham

People attend the Ash Wednesday mass to start the Lent at the St. Joseph Cathedral amid the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam February 17, 2021. REUTERS/Kham

Do Thi Oanh, 37, talks with a moneylender at her house ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 5, 2021. Picture taken February 5, 2021. REUTERS/Thanh Hue

Nguyen Dinh Kiem's daughter sits on bamboo splints used to make incense sticks ahead of Lunar New Year in Quang Phu Cau village outside Hanoi, Vietnam, February 6, 2021. Picture taken February 6, 2021. REUTERS/Thanh Hue

A worker packs dried incense sticks in a courtyard ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 3, 2021. Picture taken February 3, 2021. REUTERS/Thanh Hue

A man rides a truck loaded with dried incense sticks ahead of Lunar New Year in Quang Phu Cau village outside Hanoi, Vietnam, February 3, 2021. Picture taken February 3, 2021. REUTERS/Thanh Hue

A worker handles dried incense sticks ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 4, 2021. Picture taken February 4, 2021. REUTERS/Thanh Hue

Children play with a dog next to dried incense sticks ahead of Lunar New Year in Quang Phu Cau village outside Hanoi, Vietnam, February 5, 2021. Picture taken February 5, 2021. REUTERS/Thanh Hue

A worker handles dried incense sticks in a courtyard ahead of Lunar New Year in Quang Phu Cau village outside Hanoi, Vietnam, February 3, 2021. Picture taken February 3, 2021. REUTERS/Thanh Hue

Workers collect dried incense sticks in a courtyard ahead of Lunar New Year in Quang Phu Cau village outside Hanoi, Vietnam, February 3, 2021. Picture taken February 3, 2021. REUTERS/Thanh Hue

Workers load dried incense sticks on a truck ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 3, 2021. Picture taken February 3, 2021. REUTERS/Thanh Hue

Dried incense sticks are pictured ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 4, 2021. Picture taken February 4, 2021. REUTERS/Thanh Hue

A worker bundles dried incense sticks ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 4, 2021. Picture taken February 4, 2021. REUTERS/Thanh Hue

Workers arrange bamboo splints in order to make incense sticks ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 3, 2021. Picture taken February 3, 2021. REUTERS/Thanh Hue

Workers dye bamboo incense sticks ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 4, 2021. Picture taken February 4, 2021. REUTERS/Thanh Hue

Do Thi Oanh's family celebrate the year-end party with workers inside her incense sticks factory ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 7, 2021. Picture taken February 7, 2021. REUTERS/Thanh Hue

Nguyen Dinh Kiem, 46, sings inside his incense sticks factory ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 6, 2021. Picture taken February 6, 2021. REUTERS/Thanh Hue

Children run next to drying raw material of incense sticks ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 3, 2021. Picture taken February 3, 2021. REUTERS/Thanh Hue

A worker eats pomelo ahead of the upcoming Lunar New Year in Quang Phu Cau village outside Hanoi, Vietnam, February 5, 2021. Picture taken February 5, 2021. REUTERS/Thanh Hue

Men ride a bicycle past stacks of incense sticks kept on a street for drying ahead of Lunar New Year celebrations in Quang Phu Cau village, outside Hanoi, Vietnam, February 4, 2021. Picture taken February 4, 2021. REUTERS/Thanh Hue

A worker arranges bamboo splints in order to make incense sticks ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 3, 2021. Picture taken February 3, 2021. REUTERS/Thanh Hue

Workers take a break from their work after collecting drying incense sticks ahead of Lunar New Year celebrations in Quang Phu Cau village, outside Hanoi, Vietnam, February 4, 2021. Picture taken February 4, 2021. REUTERS/Thanh Hue

A worker handles dried incense sticks in a courtyard ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 4, 2021. Picture taken February 4, 2021. REUTERS/Thanh Hue

A worker dyes bamboo incense sticks ahead of Lunar New Year celebrations in Quang Phu Cau village outside Hanoi, Vietnam, February 4, 2021. Picture taken February 4, 2021. REUTERS/Thanh Hue