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VIVIAN, LA - DECEMBER 12: With a temperature of 103.8, Asa Moore, 6, of Vivian, Louisiana is examined at the North Caddo Surgical and Medical Center for symptoms of Influenza December 12, 2003 in Vivian, Louisiana. Moore had not received a flu shot and the medical center was out of the vaccine. (Photo by Mario Villafuerte/Getty Images)

VIVIAN, LA - DECEMBER 12: With a temperature of 103.8, Asa Moore, 6, of Vivian, Louisiana is examined at the North Caddo Surgical and Medical Center for symptoms of Influenza December 12, 2003 in Vivian, Louisiana. Moore had not received a flu shot and the medical center was out of the vaccine. (Photo by Mario Villafuerte/Getty Images)