Why Social Inequality Shapes Arbovirus Risk in Brazil

StephanieLQMarch 3, 2026March 3, 202605 mins

Brazil’s Zika and chikungunya outbreaks are shaped by more than climate. Spatial analysis shows urban density, poor sanitation, and inequality significantly increase cluster risk. Even after adjusting for geography, socioeconomic conditions remain core drivers, linking arbovirus transmission directly to infrastructure and development gaps.

Predicting the Next Surge: Using Zika–Chikungunya Clusters to Guide Intervention

StephanieLQFebruary 27, 2026February 27, 202607 mins

Zika and chikungunya outbreaks in Brazil move together, not separately. Space-time analysis reveals overlapping clusters driven by shared Aedes aegypti dynamics, summer heat, and regional climate conditions. When ecological risk rises, multiple arboviruses surge simultaneously — reinforcing the need for surveillance systems that anticipate co-circulating threats, not isolated outbreaks.