In Singapore:

"Faculty at the Environmental Health Institute in Singapore’s National Environment Agency, along with a few collaborators, selected 15 densely-populated areas of the city-state and randomly divided them into groups that would receive a transplanted swarm of IIT-SIT male mosquitoes, and others that would receive none."

https://www.goodnewsnetwork.org/infecting-mosquitoes-with-natural-bacteria-lowered-dengue-risk-by-70-in-citywide-experiment/

#mosquitoes #dengue #Singapore