People arrive at Circus nightclub in Liverpool, England, Friday April 30, 2021, for a COVID-19 safety pilot event. Researchers at the event will gather evidence for the national Events Research programme (ERP) which will see 6,000 clubbers across two nights take over Bramley Moore Dock warehouse in an event which requires no social distancing or face coverings. (Photo by Peter Byrne/PA Wire via AP Photo)
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