Dibrugarh, Feb 12: tiol De-worming Day (NDD), launched by the Ministry of Health and Family Welfare in February, 2015 as part of the tiol Health Mission to combat worm infection in India, was observed here at Grahambazar Girls’ High School, along with the other parts of the State on Monday. The aim of the observance of the day is to de-worm all the children from 1 to 19 years in order to improve their well-being.