The first case of human-to-human transfer of the swine flu virus was confirmed in Britain today, taking to 10 the number of officially confirmed infections, according to dpa. The regional government of Scotland said 24-year-old Graeme Pacitti had tested positive for the virus. He was a close friend of a couple who were diagnosed with the virus after returning from a honeymoon holiday in Mexico last week. All previous cases }n4(. in have involved people who had returned from a visit to Mexico. Health experts said the first case of human-to-human infection was a sign that the disease could establish itself.