Since Camille Chan was a baby, she has been in and out of hospital for asthma treatment. Her mother, Bonnie Chan, says they had only had Camille for about six weeks when she suffered her first attack. Camille was adopted by the Chans when she was six months old. The couple have an older child. Camille, battling to breathe, was rushed to Queen Elizabeth Hospital. Ms Chan, who knew nothing about asthma, was terrified. As the years went by, she noticed that Camille, now eight, would have an asthma attack every time the weather changed. 'Springtime is the worst season for asthmatic children. 'We would go to hospital many times a year, every change of weather or when a thunderstorm was coming. She is more accurate than the Observatory,' Ms Chan said. She can laugh about it now, because Camille has not suffered an attack in 18 months. Worried about the long-term effects of the steroid injections Camille would be given each time she had an attack, Ms Chan was determined to find something to help her daughter. 'We tried soup, herbal medicine, holistic medicine. We tried everything,' she said. Then, on the advice of a friend and after consulting their family doctor, Camille was put on a new anti-asthma medicine, a leukotriene inhibitor. Leukotriene is one of a group of hormones that causes the symptoms of asthma. Camille's last asthma attack was in 2003, she said. 'She had been taking these tablets for six months and now her symptoms are so mild that it's totally under control,' Ms Chan said. Ms Chan believes that the tablets work because they reduce the constant inflammation of the airways, the precursor to an asthma attack.