As of 9 December 2012, the Portuguese Ministry of Health has reported 2 050 cases of dengue infection from the Autonomous Region of Madeira. During the outbreak, 121 people have been hospitalised and no deaths or cases of severe dengue have been reported. Two patients remained in hospital as of 9 December 2012.
The study design and analysis controlled for influence of potentially confounding trends, such as improvement of day-care carriage and decreasing prevalence of smoking during the study period.
As of 4 November 1 148 cases of dengue infection have been reported, of which 517 were laboratory confirmed. The case definition has been revised and an automated surveillance system has been set up with the support from ECDC. The changes that were put in place meant that additional cases were identified retrospectively.
On 24 October 2012 the Portuguese Ministry of Public Health (Direcção-Geral da Saúde) confirmed 52 cases of dengue fever and 404 probable cases, compared to 37 confirmed and 262 probable cases in their last update of 17 October.