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Swine flu is presumptively diagnosed clinically by the patients history of association with people today known to have the illness and their symptoms listed above. Usually, a fast test (for example, nasopharyngeal swab sample) is accomplished to see if the patient is infected with influenza A or B virus. Most of the tests can distinguish between A and B types. The test might be negative (no flu infection) or positive for sort A and B. If the test is positive for type B, the flu isn't likely to be swine flu (H1N1). If it is positive for kind A, the person could have a conventional flu strain or swine flu (H1N1). However, the accuracy of these tests has been challenged, plus the U.S. Centers for Disease Control and Prevention (CDC) has not completed their comparative studies of these tests. However, a new test developed by the CDC and a commercial business reportedly can detect H1N1 reliably in about 1 hour; as of October 2009, the test is only out there to the military.
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