Music festival in Netherlands - will the Covid-19 spread?

A music festival took place in the Netherlands, with 1,500 mostly young people participating in an experiment about the spread of Covid-19, BBC reports. The rest of the country is in lockdown, yet the Dutch government has financed this electro-music festival and a scientific experiment that aims to see if there's a safe way to allow large-scale social gatherings to restart, without increasing the spread of the virus. The participants all had to be negative on Covid-test to take part at the fest and will be tested again next week.