Drones help rein in mosquito breeding

Aerial drones have become part of the prevention effort against dengue fever in Guangdong province, after the epidemic peaked last summer.

In Chaozhou, drones buzz around the skies over Xiangqiao district. Within minutes, they bring back photos of the district's roofs, pinpointing those with pools of water that could serve as breeding grounds for mosquitoes, which spread the disease.

Xiangqiao district reported 257 dengue fever cases as of Saturday.