There are certain ways by which we can prevent the spread of diseases like dengue and malaria. The preventive measures that one can take are:Use of insect repellents. Wearing long-sleeved shirts.Wearing long pants.Use screens on windows and doors of house.Use mosquito bed net.Use air conditioning when available.Do not allow water to accumulate for a long time in containers.Use goodnight and other stuff to keep mosquitoes away from home.Do not leave windows and doors of home open.