What sero surveys tell us about Covid in India | Latest News India - Hindustan Times
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What sero surveys tell us about Covid in India

Hindustan Times, New Delhi | By
Sep 03, 2020 01:04 PM IST

The sampling has already started for the ICMR’s second serosurvey, with many states finishing sample collection and the others in various stages of completing the process.

Results have been released from 20 rounds of seroprevalence studies that have been conducted across the country by state governments to calculate the spread of Sars-CoV-2 — the virus that causes Covid-19.

Results have been released from 20 rounds of seroprevalence studies that have been conducted across the country by state governments to calculate the spread of Sars-CoV-2 — the virus that causes Covid-19.(Bloomberg file photo)
Results have been released from 20 rounds of seroprevalence studies that have been conducted across the country by state governments to calculate the spread of Sars-CoV-2 — the virus that causes Covid-19.(Bloomberg file photo)

On Tuesday, Chennai became the latest city to release the results of a serological survey. It showed that 21.5% of the city’s population has been exposed to Sars-CoV-2.

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A look at what other serosurveys across the country have revealed about the spread of the virus:

 

NATIONWIDE SEROSURVEYS

ICMR conducted its first nationwide survey in May, while a second one is underway

WHAT THE FIRST ROUND FOUND

The first sero survey, which was conducted by Indian Council of Medical Research (ICMR) alog with National Centre for Disease Control, state health departments and the World Health Organisation (WHO) had shown pan-India prevalence of Sars-Cov-2, the virus that causes Covid-19, at 0.73%

ROUND TWO CURRENTLY UNDERWAY

ICMR is now conducting second round of a nationwide seroprevalence survey, it said on August 28

The sampling has already started for the ICMR’s second serosurvey, with many states finishing sample collection and the others in various stages of completing the process.

Who will be surveyed?

Like in the previous exercise, this survey is designed as a cross-sectional survey of adults aged 18 years or more from 21 states, wherein the districts were categorised into four strata according to the reported Covid-19 cases per million population (zero, low: 0.1-4.7, medium: 4.8-10 and high: >10).

“We have from ICMR embarked on the second national serosurvey, and it is also a work in progress, and should be completed, hopefully, by the first week of September.” - Dr Balram Bhargava, ICMR director general

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