Epidemiological characteristics of the 2005 and 2007 dengue epidemics in Singapore - similarities and distinctions.

Introduction: We investigated the epidemiological features of the 2007 dengue outbreak to determine the factors that could have triggered it two years after the previous large outbreak in 2005.

Methods: All laboratory-confirmed cases of dengue reported during the year, as well as entomological and virological data, were analysed.

Results: A total of 8826 cases including 24 deaths were reported in 2007, giving an incidence of 192.