Russia has changed the rules for the entry of foreigners through air checkpoints. So, now citizens of Belarus, Armenia and Kyrgyzstan, who have chosen air transport to travel to Russia, will need to present a negative test result for COVID-19 by PCR at checkpoints in the mobile application "Traveling without COVID-19". But, those who travel by train are not obliged to use the application - a document confirming the passage of PCR testing no earlier than 72 hours before the trip will be convenient.