Workers assemble a 200-bed temporary field hospital for people exposed to, at risk of exposure, or becoming ill with coronavirus at the Shoreline Soccer Field during the outbreak of coronavirus disease (COVID-19) in Shoreline, Washington, U.S. March 20, 2020.

A doctor in protective suite waits for patients in a special tent for coronavirus disease (COVID-19) cases near a hospital in Lublin, Poland, March 23, 2020. Jakub Orzechowski/Agencja Gazeta via REUTERS

Tents with intensive care units installed by French Army are seen at a miitary field hospital near Mulhouse hospital as France faces an aggressive progression of the coronavirus disease (COVID-19), March 23, 2020.

Workers assemble a temporary field hospital at the Pacaembu Stadium during the outbreak of coronavirus disease (COVID-19) in Sao Paulo, Brazil, March 23, 2020.

Medical equipment is seen inside the Jacob K. Javits Convention Center after New York Governor Andrew Cuomo announced that the site will be partially converted into a hospital for patients affected by the coronavirus disease (COVID-19) in Manhattan in New York City, New York, U.S., March 23, 2020.

The USNS Mercy, a Navy hospital ship, departs the Naval Station San Diego and heads to the Port of Los Angeles to aid local medical facilities dealing with coronavirus disease (COVID-19) patients, in San Diego, California, U.S., March 23, 2020.

A French soldier prepares medical gear during a drill at the military field hospital set up outside the Emile Muller Hospital in Mulhouse, France, March 24, 2020 during a lockdown to stop the spread of coronavirus disease COVID-19. Sebastien Bozon/Pool via REUTERS.

A soldier is seen at the military mobile hospital that will care for patients infected with coronavirus disease (COVID-19) in San Miguel, on the outskirts of Buenos Aires, Argentina March 24, 2020.

A general view of a field hospital being prepared at the Ostra Sjukhuset hospital area, amid the spread of the coronavirus disease (COVID-19), in Gothenburg, Sweden March 24, 2020. Adam Ihse/TT News Agency/via REUTERS

A medical officer checks medical devices at an emergency hospital that is handling coronavirus disease (COVID-19) in Kemayoran Athletes Village, to prevent the spread of the disease, in Jakarta, Indonesia March 23, 2020. Antara Foto/Hafidz Mubarak A via REUTERS

Layouts of patient areas to be constructed are seen at the Jacob K. Javits Convention Center which will be partially converted into a temporary hospital for patients affected by the coronavirus disease (COVID-19) in Manhattan in New York City, New York, U.S., March 23, 2020.

A medical officer checks devices at an emergency hospital, handling coronavirus disease (COVID-19) at Kemayoran Athletes Village, in Jakarta, Indonesia March 23, 2020. Antara Foto/Hafidz Mubarak A via REUTERS

A temporary emergency room for coronavirus threat is pictured at University Clinical Hospital in Wroclaw, Poland, March 4, 2020. Agencja Gazeta/Krzysztof Cwik via REUTERS

A doctor in protective suite leaves a special tent for coronavirus disease (COVID-19) cases near a hospital in Lublin, Poland, March 23, 2020. Jakub Orzechowski/Agencja Gazeta via REUTERS

Workers assemble a temporary field hospital at the Pacaembu Stadium during the outbreak of coronavirus disease (COVID-19) in Sao Paulo, Brazil, March 23, 2020.

French soldiers wearing face masks stand in front of Mulhouse hospital prior to the opening of a military field hospital, as the country faces an aggressive progression of the coronavirus disease (COVID-19), France March 24, 2020.

French soldiers take part in a drill at the military field hospital set up outside the Emile Muller Hospital in Mulhouse, France, March 24, 2020 during a lockdown to stop the spread of coronavirus disease COVID-19. Sebastien Bozon/Pool via REUTERS.

Workers assemble a 200-bed temporary field hospital for people exposed to, at risk of exposure, or becoming ill with coronavirus at the Shoreline Soccer Field during the outbreak of coronavirus disease (COVID-19) in Shoreline, Washington, U.S. March 20, 2020.

Workers assemble a second 200-bed temporary field hospital for people exposed to, at risk of exposure, or becoming ill with coronavirus at the Shoreline Soccer Field as efforts continue to help slow the spread of coronavirus disease (COVID-19) in Seattle, Washington, U.S. March 21, 2020.

Workers assemble a temporary field hospital at the Pacaembu Stadium during the outbreak of coronavirus disease (COVID-19) in Sao Paulo, Brazil, March 23, 2020.

U.S. Army personnel stand apart while looking on as New York Governor Andrew Cuomo speaks while visiting the Jacob K. Javits Convention Center which will be partially converted into a hospital for patients affected by the coronavirus disease (COVID-19) in Manhattan in New York City, New York, U.S., March 23, 2020.

Serbian military sets up the beds inside Hall 1 of the Belgrade Fair to accommodate people who suffer mild symptoms of coronavirus disease (COVID-19) in Belgrade, Serbia, March 24, 2020.

Medical equipment is seen stored inside the Jacob K. Javits Convention Center which will be partially converted into a temporary hospital during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., March 24, 2020.

Military personnel work at a military field hospital, as the spread of coronavirus disease (COVID-19) continues, at the Ostra Sjukhuset hospital area in Gothenburg, Sweden, March 23, 2020. TT News Agency/Photo Adam Ihse via REUTERS

Workers assemble a 200-bed temporary field hospital for people exposed to, at risk of exposure, or becoming ill with coronavirus at the Shoreline Soccer Field during the outbreak of coronavirus disease (COVID-19) in Shoreline, Washington, U.S. March 19, 2020.

French soldiers stand near medical beds at the military field hospital set up outside the Emile Muller Hospital in Mulhouse, France, March 24, 2020 during a lockdown to stop the spread of coronavirus disease COVID-19. Sebastien Bozon/Pool via REUTERS.

Military personnel prepare a field hospital at the Ostra Sjukhuset hospital area, amid the spread of the coronavirus disease (COVID-19), in Gothenburg, Sweden March 24, 2020. Adam Ihse/TT News Agency/via REUTERS

Army trucks arrive in the area of the Stockholmmassan exhibition center, where a military field hospital will be located, following an outbreak of the coronavirus disease (COVID-19), in Alvsjo district in southern Stockholm, Sweden March 23, 2020. TT News Agency/Jonas Ekstromer via REUTERS

Workers install lights on the ceiling of a 200-bed temporary field hospital for people exposed to, at risk of exposure, or becoming ill with coronavirus at the Shoreline Soccer Field during the outbreak of coronavirus disease (COVID-19) in Shoreline, Washington, U.S. March 19, 2020.

French soldiers transport a soldier on a gurney during a drill at the military field hospital set up outside the Emile Muller Hospital in Mulhouse, France, March 24, 2020 during a lockdown to stop the spread of coronavirus disease COVID-19. Sebastien Bozon/Pool via REUTERS.

Protective medical supplies are seen stacked inside the Jacob K. Javits Convention Center which will be partially converted into a temporary hospital during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., March 24, 2020.