One plaintiff falsely claimed that COVID-19 hasn't been proven to exist.
The change came after a federal judge struck down the CDC's face mask mandate for public transportation.
The change comes seven months after Universal dropped its indoor mask mandate for guests.
Christmas Town at Busch Gardens Tampa Bay kicks off with a preview weekend on Nov. 6-7.
Unvaccinated Universal team members are required to wear a face mask "at all times while on property."
Holiday parades and fireworks return to the Disneyland Resort on Nov. 12.
Universal has not been forthcoming with other COVID-19 safety details for HHN, even amid a surge in hospitalizations in Central Florida.