The current epidemiological situation in Serbia can be considered as stable. Daily overview of the number of people who were tested and infected, as well as other data, can be seen on the following website: https://covid19.rs/
Currently valid rules on the entry of foreign citizens into Serbia can be followed on the website of the Ministry of Foreign Affairs of Serbia, which is regularly updated:
https://www.mfa.gov.rs/lat/gradjani/ulazak-u-srbiju/covid-19-uslovi-za-ulazak