Empty terrace tables and seats are seen in the historical centre of Bucharest during COVID-19 pandemic in Bucharest, Romania, March 25, 2021. Romania announced late Thursday that a series of stricter prevention and control measures, including early closure of businesses and restriction of traffic, will be adopted in cities and regions with severe coronavirus situation. (Photo by Cristian Cristel/Xinhua)

An empty street is seen in the historical center of Bucharest during COVID-19 pandemic in Bucharest, Romania, March 25, 2021. Romania announced late Thursday that a series of stricter prevention and control measures, including early closure of businesses and restriction of traffic, will be adopted in cities and regions with severe coronavirus situation. (Photo by Cristian Cristel/Xinhua)

Empty terrace tables and seats are seen in the historical center of Bucharest during COVID-19 pandemic in Bucharest, Romania, March 25, 2021. Romania announced late Thursday that a series of stricter prevention and control measures, including early closure of businesses and restriction of traffic, will be adopted in cities and regions with severe coronavirus situation. (Photo by Cristian Cristel/Xinhua)

People wearing face masks walk on a street in the historical center of Bucharest during COVID-19 pandemic in Bucharest, Romania, March 25, 2021. Romania announced late Thursday that a series of stricter prevention and control measures, including early closure of businesses and restriction of traffic, will be adopted in cities and regions with severe coronavirus situation. (Photo by Cristian Cristel/Xinhua)