The number of confirmed H1N1 flu cases worldwide surpassed 10,000, the World Health Organization said Tuesday. In the United States, at least 5,469 cases of swine flu have been reported. Commonly known as swine flu, the outbreak has sickened 10,176 people and caused more than 80 deaths, mostly in Mexico, the organization said. The actual number of people affected may be higher, as it takes time for national governments to confirm cases and report them to the global body. In the United States, at least 5,469 cases of swine flu have been reported, according to the latest figures from the Centers for Disease Control and Prevention. The flu strain, which originated in Mexico, killed dozens of people there, causing U.S. officials to worry that it could take a similar toll north of the border.