Professor Mary Keogan:

At the Barcelona concert at the end of March there were 5,000 attendees and there were 80 nurses working a 12-hour shift to get the 5,000 people tested. This is massively labour intensive. It is very manual. Each test takes 15 to 20 minutes to perform. There generally is no space to have people sit there and wait for the results. In most settings, people come in, are swabbed, one does the record keeping and so forth and then people receive their results by text. It is a massive logistical undertaking to antigen test a large number of people.