The Centers for Disease Control and Prevention says Americans should not travel internationally unless they are fully vaccinated. But current rules only require those travelers to get a test within three days of returning to the country. The CDC recommends unvaccinated people get a viral test one to three days before a trip, get tested again three to five days after traveling and stay home and self-quarantine for seven days after travel, even if they test negative.
Source: Washington Post September 22, 2021 16:41 UTC