The media are investigating, but the information is difficult to come by. Disney's only
response has been:
“The data shows that we opened responsibly,” Dr. Pamela Hymel, chief medical officer for Walt Disney Parks and Resorts, said by phone. “We didn’t cause a surge.”
But without any actual numbers (more specific than what the state is reporting), we just don't know that's true. And nobody is tracking exposures/infections across state lines.
Contact tracing is necessary for public health during an epidemic. It is a valuable and effective tool that can help locate and contain the virus. Accurate data (and fast) would indeed make contact tracing as valuable as possible. What's making that job so much more difficult are the premature lowering of restrictions and the many people who refuse to follow public health guidelines and insist on "living life" at the risk of endangering others.