Whelp, they have to sit him down and push the Cassidy match back 2 weeks (at least). Anything else would be pure irresponsibility on AEW's part.
This, by the way, is what people are talking about when they say that ignoring COVID precautions are selfish. The biggest match of Orange Cassidy's life, a match that's been extensively promoted and featured by AEW (Cassidy is Tony Khan's favorite wrestler, naturally) and Jericho puts it in serious jeopardy because he doesn't have enough self-control to stay away from large crowds for the time being. Way to shyt on everyone's effort, jackass.