Hong Kong officials on Sunday confirmed a new case of swine flu, raising the city's total number of infections to seven. The new patient, a 21-year-old student, arrived from the United States via South Korea Friday night and was being treated in hospital, a spokesman for the Department of Health said. "She had onset of sore throat on the way to Hong Kong. She developed fever the following morning and was admitted to the Kwong Wah Hospital in stable condition. She was transferred to Princess Margaret Hospital today," the spokesman said. Laboratory analysis on her respiratory samples gave positive results for swine flu Sunday.