A special cleanliness drive will be conducted in all the wards under Dhaka North City Corporation (DNCC) from Saturday to prevent dengue outbreak , said DNCC Mayor Atiqul Islam.   Atiqul Islam came up with the information through a video conference on Friday.   The 10-day drive will be conducted from 10 am to 1 pm daily, except Friday, and each wards will be divided into ten sectors.