An outbreak of coronavirus linked to a Nike conference in Edinburgh has been described as “ground zero” in Scotland.Seventy people attended the event in February and 25 were later diagnosed with Covid-19, including eight in Scotland.First Minister Nicola Sturgeon has faced repeated questions on why the public was not told about the conference outbreak at the start.Edinburgh South MP Ian Murray accused authorities of a “cover-up” - a claim the First Minister strongly denies.Sturgeon insists patient confidentiality was a factor and says correct procedure was followed.Nike holds its conference at the Hilton on North Bridge, Edinburgh.