I’ll both admit and agree that I’m not clearly versed in the applicable statutes at both the state and federal level, but I don’t see a world where people can sue employers, businesses, etc. over getting infected with the corona virus.
Furthermore, if Disney expects any payout from business disruption insurance, they will need Congress to act.
I've personally been involved in lawsuits over other viral infections, for failing to take adequate infection prevention measures.
The grounds for Covid liability are even greater, where you have governments, public and private health individuals, all making recommendations.