Sixty-six-year old Yang leaves a Shanghai hospital in good health after recovering from a new strain of bird flu.<br/> <br />The virus, known as H7N9 has claimed 17 lives in China, but this patient appears to have made a full recovery.<br/> <br />He says he was coughing and sick when he went to hospital but feels much better after the treatment.<br/> <br />The first two detected H7N9 patients in Beijing have also left hospital.<br/> <br />Authorities have slaughtered thousands of birds and closed some live poultry markets to slow the rate of human infection.<br/> <br />But many aspects of this new variety of bird flu remain a mystery, particularly whether the new strain is being transmitted between people.<br/> <br />The World Health Organisation has said that a number of patients who have tested positive for H7N9 had no history of contact with poultry.<br/> <br />China has warned that the number of infections - so far at 82 - could rise.
