Medical workers put on protective gear at a hospital in Kommunarka in the suburb of Moscow, Russia, on Nov. 13, 2020. Russia registered 21,983 COVID-19 cases over the past 24 hours, a record daily increase, as the pandemic worsens in the cold season, the country's COVID-19 response center said Friday. (Photos: Xinhua)

Medical workers wearing protective gear help a person, suspected of contracting the coronavirus, to get off an ambulance near a hospital in Kommunarka in the suburb of Moscow, Russia, Nov. 13, 2020. Russia registered 21,983 COVID-19 cases over the past 24 hours, a record daily increase, as the pandemic worsens in the cold season, the country's COVID-19 response center said Friday.

A medical worker wearing protective gear gets off an ambulance near a hospital in Kommunarka in the suburb of Moscow, Russia, on Nov. 13, 2020. Russia registered 21,983 COVID-19 cases over the past 24 hours, a record daily increase, as the pandemic worsens in the cold season, the country's COVID-19 response center said Friday.

Ambulances are seen at a hospital in Kommunarka in the suburb of Moscow, Russia, on Nov. 13, 2020.Russia registered 21,983 COVID-19 cases over the past 24 hours, a record daily increase, as the pandemic worsens in the cold season, the country's COVID-19 response center said Friday.