The Centers for Disease Control and Prevention on Friday issued new guidance for domestic travel , saying people who are fully immunized against COVID-19 can travel in the U.S. and do not need to get tested or quarantine. This is a shift from March when the agency said it wasn't planning to provide updated travel guidance when it issued new recommendations for people who have been vaccinated. "Here's what we know: Every time that there's a surge in travel, we have a surge in cases in this country," CDC director Dr. Rochelle Walensky said during a March 8 press briefing . As part of the new guidance for international travel , the CDC also said fully vaccinated Americans can travel internationally without needing a COVID-19 test before they leave unless it is required by that country and do not need to self-quarantine upon return unless required by their state. However, they should have a negative test result before they return to the U.S. and get tested within 5 days of their return.