Three confirmed cases of swine flu were recorded yesterday, bringing the city's total to 15. Here are the details: CASE 13 Seventeen-year-old girl returns to Hong Kong on Sunday from Canada via Seoul. She is the cousin of a four-year-old boy who was confirmed with swine flu on Wednesday. She has no obvious symptoms on Korean Air flight 613 but has fever, sore throat and coughing as she returns home. She is traced after her cousin is confirmed as having swine flu, and admitted to hospital. She has visited a restaurant, taken a taxi, public minibus and the MTR before the admission. On Wednesday, she goes to United Christian College in Kowloon East for a graduation ceremony rehearsal. CASE 14 Eighteen-year-old woman returns from Toronto on Air Canada flight 015 on Tuesday. She shows no symptoms on plane but has fever and cough on returning home after taking Airport Express and a private vehicle. She goes to the Hong Kong Sanatorium and Hospital on Wednesday and is transferred to Queen Mary Hospital. Her parents, who had close contact with her, have shown no symptoms. CASE 15 Twenty-year-old woman who studies in the US state of Massachusetts. Her parents took her to New Jersey and they return together on Continental Airlines 99 on Monday. She has no symptoms on plane and returns home on airport bus A22. The woman goes to see private doctor on Wednesday before being transferred to Queen Elizabeth Hospital. She had been to a shopping mall, restaurants and taken taxi, MTR and a bus before admission.