[REVISION HISTORY]

Brazil dengue & chikungunya control, mixed 2026 trends

Updated 5 times since CLSTR started tracking revisions of this situation.

What changed

2026-08-25 23:15 UTC → 2026-09-09 19:38 UTC · added ~~removed~~

Through ~~August~~ early September 2026, Brazil’s public-health system continued ~~an intensified, multi-disease effort. Municipalities expanded motor-fog (motofog) units, larvicide-disseminating stations,~~ intensified efforts to combat arboviruses, though local implementation faces logistical and ~~drone-based surveillance. Notable actions included large-scale house visits in Campo Grande, where a task force targeted 17,000 homes using the Rapid Survey~~ environmental hurdles. In Votuporanga, São Paulo, officials reported that between January and August 19, over 67% of ~~Aedes Indices (LIRAa)~~ targeted properties were either closed or residents refused entry, prompting teams to ~~guide environmental management~~ attempt inspections during weekends and alternative hours. Meanwhile, in Ilhéus, health authorities intensified insecticide ~~spraying. In Dourados, Cassems Hospital and~~ applications via backpack sprayers in the ~~Zoonosis Control Center (CCZ) launched a joint initiative involving trash collection~~ Hernani Sá and ~~chemical blocking to combat an exponential rise in Chikungunya cases~~ Banco da Vitória neighborhoods following ~~a local~~ confirmed chikungunya cases. In the state of ~~emergency. Disease trends remain highly divergent. In Campinas,~~ São Paulo, ~~36 neighborhoods were placed on high alert after~~ nineteen municipalities within the ~~city confirmed 3,711 dengue~~ São José do Rio Preto regional health department have reached epidemic status, defined by incidence rates exceeding 300 cases ~~between January 1 and August 10. In Sorriso, 43%~~ per 100,000 inhabitants. While the Greater São Paulo area holds the highest absolute number of ~~ovitrap samples tested positive for Aedes aegypti, with 64 dengue~~ cases, the highest proportional risk is concentrated in the northwest, including Araçatuba, Presidente Prudente, and ~~25 chikungunya cases~~ São José do Rio Preto. As of early September, the state has recorded ~~through late August. While Cuiabá reported~~ over 58,000 confirmed cases and 41 deaths, a ~~reduction in overall dengue infestation risk~~ notable decrease from ~~“High Risk” to “Medium Risk,” several regions remain critical due to waste disposal issues. In Três Lagoas, authorities identified over 67,000~~ previous years. Authorities are monitoring El Niño, as high temperatures and irregular rainfall facilitate mosquito ~~eggs, but the city has achieved over 90% coverage~~ breeding. Vaccination efforts for ~~the first dose of the dengue vaccine among children and~~ adolescents aged 10 to ~~14. Other regional efforts include expanding influenza vaccination in Cuiabá, Primavera do Leste, and Rondonópolis. Regarding immunization, the Ministry of Health suspended~~ 14 using the ~~Instituto Butantan dengue~~ Qdenga vaccine ~~following 42 serious adverse events, including two deaths, pending an Anvisa expert panel review. This suspension does not affect~~ continue, while the ~~Takeda Qdenga~~ Butantan-DV vaccine ~~for children aged 10-14, which~~ remains ~~on the SUS schedule.~~ suspended pending investigations into adverse reactions. Previous regional efforts included large-scale house visits in Campo Grande, mosquito egg identification in Três Lagoas, and managing divergent trends in Campinas and Sorriso.

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