Chandigarh,, June 30 -- Delhi is the topmost city across the country responsible for the spread of coronavirus disease (Covid-19) in neighbouring Haryana, particularly in the national capital region (NCR) districts of the state.

Back and forth movement of a large section of population between Haryana's NCR districts and the national capital for professional and personal reasons is the cause behind the spread of disease, officials said.

State-wise travel history data and source of infection statistics show that 431 individuals who tested positive for coronavirus in Haryana had contracted the disease in Delhi.

In comparison, 89 people found infected in the state had sourced the contagion from Maharashtra, 51 from Uttar Pradesh and 15 fro...