Colombian mosquito factory fights dengue and disinformation

In a mosquito factory in Medellin, scientists are working on an ambitious experiment in Colombia to combat dengue fever.

For almost a decade, the World Mosquito Program (WMP) has been replacing the local population of Aedes aegypti flies with "biologically modified" insects of the same species to prevent the transmission of dengue, which has caused at least 4,500 so far this year in Latin America.

The project, supported by American multi-billionaire Bill Gates, has achieved promising results: dengue cases have fallen 95 percent in the northwestern Antioquia department, health authorities say.