WASHINGTON, April 26 (Reuters) - The United States is not testing airplane travelers from Mexico for the swine flu virus that has heightened fears of a possible pandemic, U.S. Homeland Security Secretary Janet Napolitano said on Sunday.

"Right now we don't think the facts warrant more active testing or screening of passengers coming in from Mexico," she said at a White House briefing.

(Editing by Patricia Zengerle)

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