The Secretary for Food and Health, Dr York Chow (fifth left); the Director of Health, Dr P Y Lam (fifth right); the wife of the Chief Executive cum Patron of the Red Ribbon Centre, Mrs Selina Tsang (centre); and the Controller of the Centre for Health Protection of the Department of Health, Dr Thomas Tsang (right), are joined by other officiating guests today (December 1) at the launch ceremony of the World AIDS Day 2011 Concert.   Close