Two years ago, researchers infected mosquitoes with bacteria and released them into parts of an Indonesian city. In areas where the infected mosquitoes were released, dengue incidence was 77% lower than in untreated areas. Nicholas Jewell of the University of California, Berkeley, who designed the study and led the statistical analysis, described it as a huge breakthrough. "We've now shown that it works in one city. If this can be replicated and used widely, it could eradicate dengue from several parts of the world for many years," Jewell said. For more on this, see our press release at Berkeley News.