Prevalence of Covid-19 infection, at 55%, is the highest in Ahmedabad containment zones: Sources

While data indicates that a large population in the containment zones has already been infected and developed some immunity to Covid-19, Ahmedabad has become a cause of concern for the Centre.

New Delhi: Containment zones in Ahmedabad have the highest prevalence of coronavirus infection among the virus hotspots where a sero surveillance was carried out recently, people in know told ET.

Ahmedabad recorded a virus prevalence rate of 55% in its containment zones, followed by Mumbai at 35% and then Kolkata, where it was in the range of 30%, the people cited earlier said.

Delhi, on the other hand, shows that 10-15% of the samples could have been infected by coronavirus, they said.


The sero surveillance in the containment zones had been conducted by the Indian Council of Medical Research (ICMR) in April.

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While data indicates that a large population in the containment zones has already been infected and developed some immunity to Covid-19, Ahmedabad has become a cause of concern for the Centre.
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“By any yardstick, the prevalence of 55 % is too high. It is not possible to explain the reason for recording such high prevalence, as a scientist too,” said a source, requesting anonymity.

“Whether there was some error in testing, mixing up or failure of the state government to keep the situation under control. That has to be investigated.”

Last week, on July 17, members of the national task force on Covod-19, including AIIMS director Randeep Guleria, ICMR director general Balram Bhargava, and Niti Aayog member Vinod Paul were in Gujarat to assess the Covid-19 situation. The state had reported over 900 new single-day infections a day earlier.

Those aware of some of the survey findings said that in all other zones, the prevalence of Covid-19 varied from 10% to 35%.
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In the sero-surveillance, people are tested for the presence of virus-fighting antibodies that the immune system produces to fight infections.

The findings are part of a two-part sero-survey research which will soon be published by the ICMR in its Indian Journal of Medical Research.
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