All arrivals should present a negative COVID-19 test certificate (in Russian or English language) dated less than 48 hours before arrival in Russia. A vaccination certificate (no matter what vaccine) does not substitute the PCR-test. There is no quarantine for tourists with a negative test.
!!! Attention !!! Foreign nationals coming from China, Israel are to go through Covid express testing after passing passport control in a Russian airport, and afterward, they have to self-isolate till getting the PCR test results (24-48 hours).