Lithuania Opera and Ballet Theatre is illuminated with green light in recognition and support of medical workers and emergency responders during the fight against COVID-19 in Vilnius, Lithuania, April 16, 2020. (Photo by Alfredas Pliadis/Xinhua)

Lithuania Opera and Ballet Theatre is illuminated with green light in recognition and support of medical workers and emergency responders during the fight against COVID-19 in Vilnius, Lithuania, April 16, 2020. (Photo by Alfredas Pliadis/Xinhua)

Lithuania Opera and Ballet Theatre is illuminated with green light in recognition and support of medical workers and emergency responders during the fight against COVID-19 in Vilnius, Lithuania, April 16, 2020. (Photo by Alfredas Pliadis/Xinhua)

Lithuania Opera and Ballet Theatre is illuminated with green light in recognition and support of medical workers and emergency responders during the fight against COVID-19 in Vilnius, Lithuania, April 16, 2020. (Photo by Alfredas Pliadis/Xinhua)

Lithuania Opera and Ballet Theatre is illuminated with green light in recognition and support of medical workers and emergency responders during the fight against COVID-19 in Vilnius, Lithuania, April 16, 2020. (Photo by Alfredas Pliadis/Xinhua)

Lithuania Opera and Ballet Theatre is illuminated with green light in recognition and support of medical workers and emergency responders during the fight against COVID-19 in Vilnius, Lithuania, April 16, 2020. (Photo by Alfredas Pliadis/Xinhua)