![A man wearing a protective face mask rides an empty train on the Moscow Metro, Russia, March 30, 2020.](/sites/default/files/multimedia_images_2020/202004europe_russia_metro_coronavirus.jpg)
A man wearing a protective face mask rides an empty train on the Moscow Metro, Russia, March 30, 2020.
© 2020 Iliya Pitalev/Sputnik via AP
A man wearing a protective face mask rides an empty train on the Moscow Metro, Russia, March 30, 2020.