However, this result may (and should) prompt further research to confirm or refute that. This is exactly the sort of thing public health officials and medical professionals need to be looking at, to inform health protocols for large gatherings and analyze the cost/benefit of not only health protocols at the event (what works, what doesn’t) but also whether an event should be held at all.

It would also be very interesting to see how the numbers differ for disease with airborne spread vs contact spread, as having some baseline data could provide valuable early input into determining how the next novel pathogen is spread.

We also need a really robust, anonymous, and automatic contact tracing system. The one Apple and others have implemented is pretty solid, but that whole process is currently infected with politics.