There are outbreaks of dengue every year in India. They vary in the predominant serotype involved, clinical features and predominant laboratory findings. This study of the 2006 outbreak in Delhi highlights clinical features and laboratory parameters of dengue cases and compares the clinical features among the adult and paediatric age groups. The 2006 outbreak had higher bleeding manifestations and a greater involvement of the adult male population than in previous outbreaks. No correlation was observed between platelet count and different bleeding manifestations until they dropped