Civic agencies in New Delhi are engaged in fogging and cleanliness drive to check breeding of dengue mosquitoes. The three municipal cooperation in the national capital are also taking out awareness campaigns in all the 272 wards requesting the people to eliminate stagnant water including in water coolers and the surroundings.AIR correspondent adds, 685 cases of dengue have been so far reported in the city with 33 patients testing positive yesterday. Figures related new dengue cases in the city will be released this afternoon.