At the past, the cases of south cities is more than the others because of a lot of mosquitoes there, it especially if water is overfill of flowerpot, bottom of plate, or water sprayer.

• 过去南部县市在登革热流行季节，病媒蚊密度偏高，经过调查发现，积水盆栽、花盆底盘、蓄水的浇花容器常常都是登革热病媒蚊的孳生源。