In Serbia, more than 1 million people, or over 13% of the country’s population, have now been vaccinated against the virus responsible for COVID-19. This early success provides a strong foundation for the broader population-wide campaign yet to come.
https://www.euro.who.int/en/countries/serbia/news/news/2021/3/serbias-covid-19-vaccination-campaign-off-to-a-strong-start