People walk into a test center at the National Arena soccer stadium for COVID-19 antibodies test in Bucharest, Romania, June 10, 2020. Romanian Prime Minister Ludovic Orban announced late Thursday a new round of relaxations of COVID-19 restrictions, including the reopening of shopping malls, gambling rooms and outdoor swimming pools as of June 15. (Photos: Xinhua)

A medical worker talks with a man to be tested for COVID-19 antibodies at a test center in the National Arena soccer stadium in Bucharest, Romania, June 10, 2020. Romanian Prime Minister Ludovic Orban announced late Thursday a new round of relaxations of COVID-19 restrictions, including the reopening of shopping malls, gambling rooms and outdoor swimming pools as of June 15.

Medical workers wait for people to be tested for COVID-19 antibodies at a test center in the National Arena soccer stadium in Bucharest, Romania, June 10, 2020. Romanian Prime Minister Ludovic Orban announced late Thursday a new round of relaxations of COVID-19 restrictions, including the reopening of shopping malls, gambling rooms and outdoor swimming pools as of June 15.

A man gets COVID-19 antibodies test at a test center in the National Arena soccer stadium in Bucharest, Romania, June 10, 2020. Romanian Prime Minister Ludovic Orban announced late Thursday a new round of relaxations of COVID-19 restrictions, including the reopening of shopping malls, gambling rooms and outdoor swimming pools as of June 15.