A man prepares roasted ox in front of a restaurant where people are receiving doses of the Chinese Sinopharm vaccine against the coronavirus disease (COVID-19) in Kragujevac, Serbia, May 4, 2021. At the Biblioteka kod Milutina restaurant whoever decides to get vaccinated is served a free meal on Tuesday, as a one-time offer to promote vaccination and contribute to the reopening of cafes, restaurants and bars. REUTERS/Marko Djurica