Since the Sars outbreak, many of my regular patients have called me to say that they are too scared to go out. Most of them postponed their appointments with me until further notice, so my business has gone down. People should follow the precautions outlined by the Department of Health, exercise every day and have a balanced diet. Exercise means outdoor exercise, during the day. Moving around at home or in an air-conditioned environment will develop your muscles but it will not improve your health. People need sunlight and fresh air. Being anxious, scared and worried will only decrease your immunity. In Chinese medicine we think that our internal organs are affected by our emotions and vice-versa. So being angry, worried and scared will result in disease. I want to warn people not to take Chinese drugs or prescription drugs when they are not sick. Many people don't understand the difference between prevention and treatment. So when they heard about formulas and drugs that would cure Sars they took them as prevention. That can result in serious side effects. If you feel unwell you should ask a doctor for advice. Diseases come and go all the time. But what is worrying is that viruses are mutating faster and faster. When a new disease breaks out in an area, the cure can always be found nearby. We are now looking for that new herb or drug that can cure Sars. Western-medicine practitioners can help us test the drugs. I think Sars has taught our society a lesson and raised our awareness about health. Hong Kong has become more united and the hygiene standards have risen. Wearing masks has also reduced people's chances of getting colds and coughs. I think Hong Kong has a bright future because our adaptability has improved. Whether it is an economic slump or an epidemic, we always come through. Now the advisory against travel to Hong Kong has been lifted it is time to concentrate on the economy. I am not afraid of the damage done, because I think we have the ability to overcome it. As told to Niki Law. If you have a story to share, contact niki.law@scmp.com