, May 18. According to the US Chinese website, on Monday (16th), the US Centers for Disease Control and Prevention (CDC) updated its travel guidance on the requirements for the new crown pneumonia epidemic in the United States, urging all domestic travelers in the United States. Take a coronavirus test before departure (no more than three days)."

  This travel recommendation from the CDC includes those who have been vaccinated and received a booster shot.

Previously, the CDC only recommended that people who have not been vaccinated and boosted get tested for the new coronavirus before traveling domestically.

  The CDC also has guidelines for testing after travel, especially if you have been in a crowded area.

"If you've been to a crowded place and didn't wear an appropriate mask," the CDC recommends a coronavirus test after domestic travel.

  Finally, the CDC reminds travelers that while traveling within the United States, you should still pay attention to local epidemic prevention regulations, and do not assume that the epidemic prevention regulations in your place are the same as those in other places.

  After arriving at their destination, the CDC advises people to "follow the recommendations and requirements of the local health agency."

  Updates to the CDC's domestic travel recommendations are different from the agency's requirements for international travelers.

  International travelers must take a negative COVID-19 test within the day before travel, or submit proof of recovery from COVID-19 infection within the past 90 days.

However, children under the age of 2 do not need testing.

  The CDC also recommends that international travelers arriving in the U.S. get tested 3-5 days later.

  In addition, foreign citizens entering the U.S. must be vaccinated against COVID-19, but this rule does not apply to international travel by U.S. citizens and green card holders.