Experts discuss how environmental changes are altering the risk for mosquito-borne diseases

Climate change and human activity are enabling the spread of mosquito-borne diseases, like dengue fever, to new places. Stanford infectious disease experts and disease ecologists discuss what we know and how communities can protect themselves from these changing disease threats.

This photograph depicts a female Aedes aegypti mosquito, which is the primary vector for the spread of Dengue fever. This July, the World Health Organization warned that climate change could push dengue cases to near-record numbers. (Image credit: James Gathany/CDC)

The changing climate is dramatically altering the landscape of mosquito-borne diseases. Warmer temperatures, changes in rainfall, and human activity are enabling their spread to new places often unprepared to deal with them.

This year, locally transmitted malaria cases cropped up in Florida and Texas for the first time in 20 years. But dengue fever has dominated global headlines, with outbreaks unprecedented in their locations, severity, and duration. With deadly outbreaks from Bangladesh to Peru and record numbers of cases in Europe, the World Health Organization officials this July warned that climate change could push dengue cases to near-record numbers.

Mordecai is among several Stanford experts who are leading efforts to understand how climate change is impacting the spread of various mosquito vectors and the deadly diseases they carry – and how to respond. Educating communities and health providers about the differences between these various mosquitoes on the move is critical to protecting public health, they say.

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