Around 1,500 volunteers equipped with face masks, hand disinfectant and tracking gadgets attended an indoor concert in Leipzig, Germany as part of a study to simulate how coronavirus spreads in large gatherings.
Researchers from the University Medical Centre in Halle want to find out how cultural and sporting events can safely take place without posing a risk to the population.
Volunteers in the so-called Restart 19 study were handed protective face masks of the type typically used in hospitals and bottles of flurorescent hand sanitiser at the concert of German singer-songwriter Tim Bendzko in an indoor arena in Leipzig.