Urban heat island intensity and chikungunya incidence: a multi-city time-series analysis in Brazil.
OBJECTIVES Urban heat islands (UHIs) produce 2°C-8°C in urban cores excesses, accelerating Aedes aegypti development and shortening chikungunya virus (CHIKV) extrinsic incubation, yet UHI intensity's (UHII) independent contribution to CHIKV transmission remanins unquantified. METHODS We conducted an ecological time-...