Vietnam and Asian countries such as Laos, Singapore, China, and South Korea have been listed as level 1, or those with the lowest Covid-19 risks and deemed the safest for travel.
The agency advised American citizens to get fully vaccinated before traveling to Vietnam and follow local recommendations and requirements like wearing a mask and staying six feet away from others.
The U.S. has recorded 34.2 million infections and over 610,000 deaths.
Vietnam has been grappling with a new wave of Covid since April 27, with 6,045 infections in 39 of its 63 provinces and cities.
While low-income countries are struggling to secure enough doses of vaccine due to a lack of supply, 42.3 percent of Americans have been fully vaccinated.
Vietnam has vaccinated more than 1.3 million of its 96 million people.