New Delhi, July 4 (PTI) The Delhi government has directed district magistrates to start COVID-19 survey outside containment zones, focusing on vulnerable sections in areas with sporadic cases, sources said on Saturday.

Earlier this week, the Union Home Ministry had said door-to-door survey would be completed in coronavirus containment zones of Delhi by July 6, followed by a similar exercise across the national capital.

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"Now, the survey will be expanded in its scope beyond containment zones, focusing in areas where isolated cases have been reported. Vulnerable people who live in such areas will be priority as they are likely to catch infections rather more frequently," a source said.

The door-to-door survey in containment zones was near complete when the home ministry issued its direction on last Monday.

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Now, the survey outside containment zones will seek to identify people having influenza like illness (ILI) and severe acute respiratory infections (SARI) and the high risk individuals having co-morbidities.

"The focus on areas with isolated cases will ensure greater effectiveness of the survey as a general door-to-door approach will require more time and resources," the source said.

The survey has been planned according to the directions of the central government, they said.

the Delhi government had last week launched the mammoth exercise to screen the national capital's population for coronavirus and fixed the deadline to complete the task by July 6.

Hundreds of teams have been formed to carry out the survey. The teams are armed with a mobile application -- SS Corona -- which will send real-time details to a dedicated web portal set up by the government.

Apart from basic details like name, age, address and contact number, the teams are feeding the mobile application with information such as every individual's travel history, whether or not they use the Centre's Aarogya Setu app and if they have symptoms of influenza.

(The above story is verified and authored by Press Trust of India (PTI) staff. PTI, India’s premier news agency, employs more than 400 journalists and 500 stringers to cover almost every district and small town in India.. The views appearing in the above post do not reflect the opinions of LatestLY)