Anyone traveling to the United States will soon have to show proof of a negative test for COVID-19, health officials have said.

The Centers for Disease Control and Prevention’s requirement extends on a similar requirement announced at the end of last month for passengers arriving from the UK.

COVID is already widespread in the United States, with more than 22 million cases reported to date, including more than 3.75,000 deaths. The new measures are designed to try to prevent travelers from introducing new forms of the virus that scientists say can spread more easily.

The CDC’s order is due to go into effect in about two weeks, Jan. 26. It requires air passengers to take a COVID-19 test within three days before their flight departs to the United States and provide written proof of the test result to the airline. . Travelers can also provide documents showing that they have had the infection in the past and that they have recovered.

Airlines must prevent passengers from boarding if they do not have proof of a negative test or previous infection.

“Testing does not eliminate all risk,” CDC director Robert R. Redfield said in a statement.

“But when combined with a period of stay at home and daily precautions like wearing masks and social distancing, it can make travel safer, healthier and more responsible by reducing the spread on airplanes,” at airports and at destinations, ”he added.

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