Why wouldn't the public authorities be contact tracing?
It would seem newsworthy to mention that the CDC has advised against contact tracing.
Which is the opposite of what their own field books recommend.
Also, it would seem you would
report x number of attendees reported they were infected.
As that does seem newsworthy.
Moving on, it would seem newsworthy to point out that prior to February 25th, such an event would have required masking. Which would have severely reduced transmissions.