Karachi Metropolitan Corporation (KMC) is initiating spray against malaria and dengue which will continue till October 21. The spray will be undertaken in all the districts and the suburbs of the city. It will also be done at the commercial centres as well as at the public places. In the thickly populated areas and narrow lanes, manual spray machines would be used. A schedule for the spray has also been announced covering various areas and district councils of the metropolis.