Federal authorities said fully vaccinated people can resume recreational travel in the U.S. at "low risk,” and signaled a relaxation of operational guidelines for cruise ships, handing a major boost to the nation’s battered tourism industry.

Releasing its long-awaited travel guidance Friday, the U.S. Centers for Disease Control and Prevention said vaccinated individuals don’t need a COVID-19 test and don’t need to quarantine, when traveling domestically. They should still wear a mask and avoid crowds.

And in a separate statement, the CDC set out initial recommendations to help get cruise ships sailing again, including a timeline for vaccinating crew, and updating a color-coding system to classify whether a vessel should be clear to leave port.