A man receives the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha 

A health worker administers the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha 

A health worker prepares to administer the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha 

A health worker prepares to administer the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha 

A woman receives the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha 

A woman receives the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha 

A man receives the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha 

A health worker receives the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha 

A health worker holds up a vial of Sinovac's CoronaVac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha 

A man receives the Sinovac coronavirus disease (COVID-19) vaccine at the Samut Sakhon hospital in Samut Sakhon province, Thailand, February 28, 2021. REUTERS/Athit Perawongmetha 

A healthcare worker takes off her protective gloves during proactive testing at the work place of migrant workers, amid the spread of the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, Thailand January 29, 2021. REUTERS/Soe Zeya Tun 

A healthcare worker takes a nasal swab sample from a migrant worker during proactive testing at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, Thailand January 29, 2021. REUTERS/Soe Zeya Tun 

Migrant workers wait for a nasal swab at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, Thailand January 29, 2021. REUTERS/Soe Zeya Tun 

A migrant worker reacts during a nasal swab at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, Thailand January 29, 2021. REUTERS/Soe Zeya Tun 

A migrant worker reacts during a nasal swab at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, Thailand January 29, 2021. REUTERS/Soe Zeya Tun 

A healthcare worker takes a nasal swab sample from a migrant worker during proactive testing at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, Thailand January 29, 2021. REUTERS/Soe Zeya Tun 

Healthcare workers get ready to collect samples during proactive testing of migrant workers at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak in Samut Sakhon province in Thailand, January 27, 2021. REUTERS/Chalinee Thirasupa 

Healthcare workers get ready to collect samples during proactive testing of migrant workers at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak in Samut Sakhon province in Thailand, January 27, 2021. REUTERS/Chalinee Thirasupa 

A healthcare worker takes a nasal swab sample from a migrant worker during proactive testing at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak in Samut Sakhon province in Thailand, January 27, 2021. REUTERS/Chalinee Thirasupa 

A healthcare worker takes a nasal swab sample from a migrant worker during proactive testing at his work place, amid the spread of the coronavirus disease (COVID-19) outbreak in Samut Sakhon province in Thailand, January 27, 2021. REUTERS/Chalinee Thirasupa 

Migrant workers queue to be tested for COVID-19 during proactive testing at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak in Samut Sakhon province in Thailand, January 27, 2021. REUTERS/Chalinee Thirasupa 

A health worker gets ready to collect samples during proactive testing of migrant workers at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak in Samut Sakhon province in Thailand, January 27, 2021. REUTERS/Chalinee Thirasupa 

Migrant workers queue to be tested for COVID-19 during proactive testing at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak in Samut Sakhon province in Thailand, January 27, 2021. REUTERS/Chalinee Thirasupa 

Healthcare workers take nasal swab samples from migrant workers during proactive testing at their work place, amid the spread of the coronavirus disease (COVID-19) outbreak in Samut Sakhon province in Thailand, January 27, 2021. REUTERS/Chalinee Thirasupa 

A girl pulls a cart as Myanmar migrant worker families pass their time under barricade lockdown at Samut Sakhon Shrimp in Samut Sakhon, Thailand, January 26, 2021. REUTERS/Soe Zeya Tun 

A child wears a face mask as Myanmar migrant worker families pass their time under barricade lockdown at Samut Sakhon Shrimp in Samut Sakhon, Thailand, January 26, 2021. REUTERS/Soe Zeya Tun 

A child wears a face mask and a shield as Myanmar migrant worker families pass their time under barricade lockdown at Samut Sakhon Shrimp in Samut Sakhon, Thailand, January 26, 2021. REUTERS/Soe Zeya Tun 

Myanmar migrant worker families pass their time under barricade lockdown at Samut Sakhon Shrimp in Samut Sakhon, Thailand, January 26, 2021. REUTERS/Soe Zeya Tun 

A mannequin is pictured at a closed shop during a barricade lockdown at Samut Sakhon Shrimp in Samut Sakhon, Thailand, January 26, 2021. REUTERS/Soe Zeya Tun 

Myanmar migrant worker family pass their time under barricade lockdown at Samut Sakhon Shrimp in Samut Sakhon, Thailand, January 26, 2021. REUTERS/Soe Zeya Tun 

Myanmar migrant worker families pass their time under barricade lockdown at Samut Sakhon Shrimp in Samut Sakhon, Thailand, January 26, 2021. REUTERS/Soe Zeya Tun 

Myanmar migrant worker families pass their time under barricade lockdown at Samut Sakhon Shrimp in Samut Sakhon, Thailand, January 26, 2021. REUTERS/Soe Zeya Tun 

Myanmar migrant worker families pass their time under barricade lockdown at Samut Sakhon Shrimp in Samut Sakhon, Thailand, January 26, 2021. REUTERS/Soe Zeya Tun 

Myanmar migrant worker families pass their time under barricade lockdown at Samut Sakhon Shrimp in Samut Sakhon, Thailand, January 26, 2021. REUTERS/Soe Zeya Tun 

A healthcare worker takes a nasal swab sample of a child for a COVID-19 test at a migrant community, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

A healthcare worker takes a nasal swab sample of a migrant worker for a COVID-19 test at a migrant community, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

Migrant workers queue for a COVID-19 nasal swab test at a migrant community, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

A healthcare worker takes a nasal swab sample of a migrant worker for a COVID-19 test at a migrant community, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

A healthcare worker takes a nasal swab sample of a migrant worker for a COVID-19 test at a migrant community, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

A healthcare worker takes a nasal swab sample of a migrant worker for a COVID-19 test at a migrant community, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

Migrant workers queue for a COVID-19 nasal swab test at a migrant community, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

Migrant workers stand in front of a closed shrimp market, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

A migrant worker receives belongings over barbed wire in front of a closed shrimp market, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

A migrant worker stands next to barbed wire in front of a closed shrimp market, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

Migrant workers stand in front of a closed shrimp market, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

A migrant worker stands next to barbed wire in front of a closed shrimp market, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 20, 2020. REUTERS/Athit Perawongmetha 

Migrant workers of a seafood market are seen before being tested, amid the coronavirus disease (COVID-19) outbreak, at a seafood market, in Samut Sakhon province, in Thailand, December 19, 2020. REUTERS/Panumas Sanguanwong 

A medical worker performs a nose swab on a migrant worker at a seafood market, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 19, 2020. REUTERS/Panumas Sa 

A medical worker performs a nose swab on a migrant boy at a seafood market, amid the coronavirus disease (COVID-19) outbreak, in Samut Sakhon province, in Thailand, December 19, 2020. REUTERS/Panumas Sa 

A woman shows images as Thai archaeologists uncover a whale skeleton, thought to be between 3,000 and 5,000 years old and belonging to a Bryde's whale at Samut Sakhon, Thailand December 4, 2020. REUTERS/Soe Zeya Tun 

A Thai archaeologist uncovers a whale skeleton, thought to be between 3,000 and 5,000 years old and belonging to a Bryde's whale at Samut Sakhon, Thailand December 4, 2020. REUTERS/Soe Zeya Tun 

A Thai archaeologist uncovers a whale skeleton, thought to be between 3,000 and 5,000 years old and belonging to a Bryde's whale at Samut Sakhon, Thailand December 4, 2020. REUTERS/Soe Zeya Tun 

Trainers wearing face masks prepare their Muaythai boxers before their fights in front of empty spectator seats behind closed doors due to the spread of the coronavirus disease (COVID-19) at the Siam Boxing Stadium in Samut Sakhon province, Thailand, June 4, 2020. REUTERS/Athit Perawongmetha 

Trainers wearing face masks prepare their Muaythai boxers before their fights in front of empty spectator seats behind closed doors due to the spread of the coronavirus disease (COVID-19) at the Siam Boxing Stadium in Samut Sakhon province, Thailand, June 4, 2020. REUTERS/Athit Perawongmetha 

A Muaythai boxer wearing a face mask is pictured before his fight in front of empty spectator seats behind closed doors due to the spread of the coronavirus disease (COVID-19) at the Siam Boxing Stadium in Samut Sakhon province, Thailand, June 4, 2020. REUTERS/Athit Perawongmetha 

Muaythai boxers fight in front of empty spectator seats behind closed doors due to the spread of the coronavirus disease (COVID-19) at the Siam Boxing Stadium in Samut Sakhon province, Thailand, June 4, 2020. REUTERS/Athit Perawongmetha 

A referee and Muaythai boxers wearing face shields gather before their fight in front of empty spectator seats behind closed doors due to the spread of the coronavirus disease (COVID-19) at the Siam Boxing Stadium in Samut Sakhon province, Thailand, June 4, 2020. REUTERS/Athit Perawongmetha 

A Muaythai boxer wearing a face shield performs the Muay Thai traditional dance before his fight in front of empty spectator seats behind closed doors due to the spread of the coronavirus disease (COVID-19) at the Siam Boxing Stadium in Samut Sakhon province, Thailand, June 4, 2020. REUTERS/Athit Perawongmetha 

Muaythai boxers fight in front of empty spectator seats behind closed doors due to the spread of the coronavirus disease (COVID-19) at the Siam Boxing Stadium in Samut Sakhon province, Thailand, June 4, 2020. REUTERS/Athit Perawongmetha 

Muaythai boxers fight in front of empty spectator seats behind closed doors due to the spread of the coronavirus disease (COVID-19) at the Siam Boxing Stadium in Samut Sakhon province, Thailand, June 4, 2020. REUTERS/Athit Perawongmetha