New Surveys Flag Dengue Hotspots in Brazil as Cities Restart Control Drives

Overview

• Brazil has logged about 1.3 million probable dengue cases from January to October 2025, a drop of more than 70% from nearly 6 million in 2024, yet officials warn outbreak risk persists.
• Sergipe’s sixth LIRAa found 40 municipalities at medium risk, one at high risk—Simão Dias at 5.0—and 32 at low risk, according to the state health secretariat.
• Montes Claros reported a 3.7% Aedes aegypti infestation in a survey conducted from October 28 to November 6, with 98% of breeding sites located inside homes.
• Campos dos Goytacazes recorded a 4.4% infestation rate and resumed citywide mutirões through December 19 with home inspections, larviciding, removal of water-holding materials, tank screens, guidance to residents and targeted spraying.
• Specialists note all four dengue serotypes are circulating and recommend vaccination for eligible groups alongside routine household measures to eliminate standing water.