1,000 Barcelona residents participated in a live concert medical study on Saturday, 12th December to evaluate the effectiveness of same-day COVID-19 screenings for physical events. According to a report by The Associated Press, 500 of the volunteers were randomly selected to enjoy a free five-hour concert inside Barcelona's Apollo Theater after passing an antigen screening - a test which produces results in 15 minutes but with less accuracy than those with longer waiting times. Although selected volunteers had to wear FFP2 face masks and use hand disinfectant, social distancing wasn’t enforced in order to emulate a real concert atmosphere on the dancefloor - a rare indulgence for attendees while the rest of Spain remained bound by health authority rules to remain seated and two meters apart. But speaking to The Associated Press, Dr. Boris Revollo, the virologist who designed the study’s protocols, emphasised that: “This is not a party, this is a scientific study.”