Photo taken on March 21, 2020 shows the interior view of the IFEMA Exhibition center in Madrid, Spain. Sunday saw the first patients arrive at the field hospital which has been set up at the IFEMA exhibition center in Madrid by members of the Spanish military's Emergency Response Unit. The field hospital will eventually have space for 5,500 beds and also an intensive care unit. (EFE/Handout via Xinhua)

Photo taken on March 21, 2020 shows the field hospital set up at the IFEMA Exhibition center in Madrid, Spain. Sunday saw the first patients arrive at the field hospital which has been set up at the IFEMA exhibition center in Madrid by members of the Spanish military's Emergency Response Unit. The field hospital will eventually have space for 5,500 beds and also an intensive care unit. (EFE/Handout via Xinhua)

An ambulance arrives at the IFEMA Exhibition center in Madrid, Spain, March 23, 2020. Sunday saw the first patients arrive at the field hospital which has been set up at the IFEMA exhibition center in Madrid by members of the Spanish military's Emergency Response Unit. The field hospital will eventually have space for 5,500 beds and also an intensive care unit. (EFE/Handout via Xinhua)

Health personnel prepare beds at the field hospital set up at the IFEMA Exhibition center in Madrid, Spain, March 22, 2020. Sunday saw the first patients arrive at the field hospital which has been set up at the IFEMA exhibition center in Madrid by members of the Spanish military's Emergency Response Unit. The field hospital will eventually have space for 5,500 beds and also an intensive care unit. (EFE/Handout via Xinhua)

A health worker is seen at the IFEMA Exhibition center in Madrid, Spain, March 23, 2020. Sunday saw the first patients arrive at the field hospital which has been set up at the IFEMA exhibition center in Madrid by members of the Spanish military's Emergency Response Unit. The field hospital will eventually have space for 5,500 beds and also an intensive care unit. (EFE/Handout via Xinhua)