ATLANTA - The U.S. Centers for Disease Control and Prevention released new guidelines Friday that green light people fully vaccinated against COVID-19 to travel safely within the United States.The new guidelines say vaccinated travelers are less likely to get and spread the virus, but the CDC still recommends safety measures like wearing a mask, social distancing and hand washing.Fully vaccinated travelers do not need to get tested before or after travel unless such testing is required by their destination.