Palm Beach County schools were averaging about 4,000 quarantines a day a few weeks ago, Robinson said. The large number persuaded the district to mandate that all students wear masks, defying the state Health Department and DeSantis, who said they must be optional. All the other large districts in Florida have imposed similar rules, including Broward and Miami-Dade. The state’s ban on mask mandates remains in effect under the new state order.