Antigen Rapid Test Screening to Prevent SARS-CoV-2 Transmission (COVID-19) at Mass Gathering Events.

To investigate the impact of rapid antigen testing for Severe Acute Respiratory Syndrome Corona Virus-2 (SARS-CoV-2), the investigators plan to conduct a large trial to assess the impact of using rapid tests to screen people before participating at a mass gathering event, i.e. a music concert. Among participants who wish to attend and fulfill the inclusion criteria, half will be offered access to rapid testing and concert (provided the test is negative), and the other half will not. Allocation will be by randomisation. A week after the concert both groups will be tested by means of a standard PCR-test.