Passengers walk at the Barajas Airport in Madrid, Spain, March 3, 2021. The Spanish government said on Wednesday that it would maintain the mandatory quarantine put into effect in February for passengers arriving from Brazil and South Africa to stop the spread of the coronavirus variants, while extending such controls to arrivals from 12 more countries. (Xinhua/Meng Dingbo)

Photo taken on March 3, 2021 shows a view of the Barajas Airport of Madrid, Spain. The Spanish government said on Wednesday that it would maintain the mandatory quarantine put into effect in February for passengers arriving from Brazil and South Africa to stop the spread of the coronavirus variants, while extending such controls to arrivals from 12 more countries. (Xinhua/Meng Dingbo)

Passengers walk out of the Barajas Airport in Madrid, Spain, March 3, 2021. The Spanish government said on Wednesday that it would maintain the mandatory quarantine put into effect in February for passengers arriving from Brazil and South Africa to stop the spread of the coronavirus variants, while extending such controls to arrivals from 12 more countries. (Xinhua/Meng Dingbo)