Antigen testing and viewing 'pods' will allow 3,500 people to attend a festival in Dublin this afternoon.
The event, at Royal Hospital Kilmainham, is part of a series of pilots aimed at safely bringing back music and culture to Irish audiences.
Sharon Shannon, Wild Youth and Gavin James are among the acts set to perform today.
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Dr Robert Ryan from Medmark says anyone who takes an antigen test and returns a positive result will not be allowed attend.