Cranes and containers are seen at the Yantian port in Shenzhen, following the novel coronavirus disease (COVID-19) outbreak, Guangdong province, China May 17, 2020. Picture taken May 17, 2020. REUTERS/Martin Pollard

A cargo ship carrying containers is seen near the Yantian port in Shenzhen, following the novel coronavirus disease (COVID-19) outbreak, Guangdong province, China May 17, 2020. Picture taken May 17, 2020. REUTERS/Martin Pollard

Cranes and containers are seen at the Yantian port in Shenzhen, following the novel coronavirus disease (COVID-19) outbreak, Guangdong province, China May 17, 2020. Picture taken May 17, 2020. REUTERS/Martin Pollard

Cranes and containers are seen at the Yantian port in Shenzhen, following the novel coronavirus disease (COVID-19) outbreak, Guangdong province, China May 17, 2020. Picture taken May 17, 2020. REUTERS/Martin Pollard

A staff member wearing a face mask is seen at the Suifenhe Port in Heilongjiang province on the border with Russia, as the spread of the novel coronavirus disease (COVID-19) continues in the country, China April 12, 2020. REUTERS/Yew Lun Tian

Containers of Chinese companies China Shipping and COSCO (China Ocean Shipping Company) are loaded on a container as it is leaving the port in Hamburg, Germany March 11, 2020. REUTERS/Fabian Bimmer

Workers walk past the coronavirus-hit cruise ship Diamond Princess as they leave the Yokohama Port, south of Tokyo, Japan February 21, 2020. REUTERS/Kim Kyung-Hoon

A worker is seen next to Maersk shipping containers at a logistics center near Tianjin port, in Tianjin, China December 12, 2019. Picture taken December 12, 2019. REUTERS/Yilei Sun

Passengers wait for transportation after leaving the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Passengers drag their luggages after disembarking the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Passengers drag their luggages after disembarking the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

A passenger's luggages are loaded into a vehicle after disembarking the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Japanese self defense personnel stands near buses as passengers disembark the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Masked passengers react from on board the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers load luggage into a bus as a second group of passengers from the coronavirus-hit Diamond Princess cruise ship disembark in Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

A boy boards a bus after leaving the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Russian passengers walk with their luggage after leaving the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Russian passengers walk with their luggage after leaving the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

A passenger is seen inside a bus as a second group of passengers from the coronavirus-hit Diamond Princess cruise ship disembark in Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Athit Perawongmetha

A passenger waves after leaving the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

A passenger waves after leaving the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Passengers look on from on board the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

A bus waits as a second group of passengers from the coronavirus-hit Diamond Princess cruise ship disembark in Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Athit Perawongmetha

Passengers wait for transportation after leaving the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Passengers wait for transportation after leaving the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Passengers wait for transportation after leaving the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon TPX IMAGES OF THE DAY

Workers in protective gear escort disembarking passengers from the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

A bus is seen as a second group of passengers from the coronavirus-hit Diamond Princess cruise ship disembark in Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Athit Perawongmetha

Masked passengers look on from on board the coronavirus-hit Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers in protective gear escort disembarking passengers from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers in protective gear help to load disembarking passengers luggage onto a bus after leaving the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers in protective gear look on as disembarking passengers leave the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Passengers are seen on the coronavirus-hit Diamond Princess cruise ship in Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Athit Perawongmetha

Workers in a bus wear masks, as a second group of passengers from the coronavirus-hit Diamond Princess cruise ship disembark, in Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Athit Perawongmetha

Passengers are seen on board the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

A bus waits as a second group of passengers from the coronavirus-hit Diamond Princess cruise ship disembark in Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Athit Perawongmetha

People walk towards waiting vehicles as a second group of passengers from the coronavirus-hit Diamond Princess cruise ship disembark in Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Athit Perawongmetha

A driver helps disembarking passengers with their bags as they leave the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Passengers are seen on the coronavirus-hit Diamond Princess cruise ship in Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Athit Perawongmetha

Workers in protective gear escort disembarking passengers from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers in protective gear escort disembarking passengers from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

A worker in protective gear walks on the coronavirus-hit Diamond Princess cruise ship in Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Athit Perawongmetha

A taxi waits as a second group of passengers from the coronavirus-hit Diamond Princess cruise ship prepares to disembark at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Athit Perawongmetha

Workers in protective gear escort disembarking passengers from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers in protective gear escort disembarking passengers from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers in protective gear and self defense army personnel wait to escort disembarking passengers from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers in protective gear and self defense army personnel wait to escort disembarking passengers from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Masked passengers wave to leaving passengers disembarking the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers in protective gear escort disembarking passengers to a vehicle from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers in protective gear escort disembarking passengers to a vehicle from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Masked passengers look out from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Masked passengers look out from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Workers in protective gear prepare to escort disembarking passengers to a bus, from the Diamond Princess cruise ship docked at Yokohama Port, south of Tokyo, Japan, February 20, 2020. REUTERS/Kim Kyung-Hoon

Employees wearing face masks serve customers at a port hall inside a wholesale market for agricultural products, as the country is hit by an outbreak of the novel coronavirus, in Beijing, China February 19, 2020. REUTERS/Tingshu Wang

A general view of the security checkpoint in front of cruise ship MS Westerdam at dock in the Cambodian port of Sihanoukville, Cambodia February 17, 2020. REUTERS/Clare Baldwin

Cruise ship MS Westerdam is seen at dock in the Cambodian port of Sihanoukville, Cambodia February 17, 2020. REUTERS/Clare Baldwin

Man uses a phone to take a picture in front of the cruise ship MS Westerdam at dock in the Cambodian port of Sihanoukville, Cambodia February 16, 2020. REUTERS/Matthew Tostevin

The cruise ship MS Westerdam at dock in the Cambodian port of Sihanoukville, Cambodia February 16, 2020. REUTERS/Matthew Tostevin

The cruise ship MS Westerdam at dock in the port of Sihanoukville, Cambodia February 15, 2020. REUTERS/Matthew Tostevin

Passengers leave the cruise ship MS Westerdam in the Cambodian port of Sihanoukville, February 15, 2020. REUTERS/Matthew Tostevin