[REVISION HISTORY]

Brazil dengue & chikungunya control, mixed 2026 trends

Updated 15 times since CLSTR started tracking revisions of this situation.

What changed

2026-10-23 23:52 UTC → 2026-10-27 00:16 UTC · added ~~removed~~

By late 2026, Brazil’s public-health system continued managing arbovirus risks despite a general decline in infection rates compared to 2025. A Ministry of Health survey (LIRAa) conducted between May and August revealed that 49.2% of 3,732 surveyed municipalities are at alert or risk levels for Aedes aegypti. While overall probable dengue cases fell 70% from 1.5 million in 2025 to 470,500 in 2026, ~~local outbreaks and rising~~ chikungunya ~~rates persist.~~ and zika cases also saw significant reductions of 43% and 35%, respectively. Regional trends remain highly variable. In ~~Goiânia, health authorities conducted over 1.7 million home visits in 2026, eliminating more than 953,000 Aedes aegypti breeding sites. The city recorded 33,065 confirmed~~ Mato Grosso, probable dengue cases ~~and 750 chikungunya~~ fell 67% compared to 2025, though officials noted a 3.23% lethality rate among severe cases. Conversely, Campinas, São Paulo, is facing a significant outbreak with 4,131 confirmed cases, ~~representing~~ prompting a ~~21% and 351% increase respectively over the same period~~ maximum alert in ~~2025.~~ 32 neighborhoods. In ~~Paraíba, the Ministry of Health~~ Mato Grosso do Sul, Três Lagoas reported ~~7,296 probable dengue~~ 113 confirmed cases of mosquito-borne diseases, including dengue, chikungunya, and ~~14 deaths, a 55.6% increase in mortality compared to 2025. Serotype 3 has emerged as the most prevalent circulating strain in that region.~~ zika. In Goiás, ~~Governor Daniel Vilela has mobilized municipal leaders~~ authorities have intensified responses to ~~establish~~ a ~~joint protocol following 108,540~~ 343% surge in chikungunya, with the state reporting 108,673 confirmed dengue cases and ~~a 343% surge~~ 11,311 chikungunya cases. Efforts include deploying ovitraps, Larvicidal Disseminating Stations, and cleaning stream banks in ~~chikungunya. A ‘Dia D’ (Action Day) is scheduled for November 26~~ Goiânia to ~~intensify~~ mitigate both flood risks and mosquito ~~control. Strategies~~ breeding. Other local initiatives include ~~expanding Basic Health Unit hours, monitoring vaccine stocks,~~ Rio de Janeiro’s ‘SVS na Rua’ inspections across 16 neighborhoods, and ~~using ovitraps in 104 municipalities. Local efforts continue~~ community cleanup projects like ‘Bota-fora do Aedes’ in ~~Votuporanga and Igrejinha, where authorities are using residential visits~~ Nova Lima and the ‘Desapega’ project ~~to collect disposable items that accumulate rainwater. Technological and biological innovations, such as Minas Gerais’ ‘VigiDrones’ program and the Wolbachia method~~ in ~~Corumbá, remain central to the national response.~~ Igrejinha.

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