Mosquitoes released in fight against dengue fever

More than half a million specially bred male mosquitoes are being released on an island in southern China every week to fight dengue fever.

The mosquitoes produced at a science park "factory" in Guangdong province can make their female mating partners infertile.

Scientists have managed to reduce the number of mosquitoes in some areas of the island by more than 90 percent, Guangzhou-based Southern Metropolis Daily reported.