The action scene in the movie was improvised on the day of filming.
Entirely made with the help of family and friends.
At the beginning of March 2020, most of the European countries announced their own lockdowns to prevent the spread of COVID-19. One day before the lockdown in Bulgaria, Marin Rangelov, Kal Minev, Rumen Russev and Lyubomir Balabanov came up with the idea for COVID-20.