Tamil Nadu’s overall seroprevalence is 70%
The Hindu
A re-survey of the third serosurvey shows three districts have over 80% seropositivity
A re-survey of the third serosurvey has put Tamil Nadu’s overall seroprevalence at 70%. Of the 37 districts, Virudhunagar, Tenkasi and Chennai have over 80% seropositivity, while Perambalur, Ariyalur, the Nilgiris and Karur have seropositivity of less than 60%.
The Directorate of Public Health and Preventive Medicine had taken up the State-wide Cross Sectional Serosurvey-Phase III during July-August 2021. A total of 827 clusters were included, with 24,586 samples covered. Among them, 17,090 individuals had IgG antibodies against SARS-CoV-2, the virus that is causing COVID-19. The findings that were first released on July 31 put the overall seroprevalence — the presence of antibodies to SARS-CoV-2 — at 66.2%.
On Thursday, the Directorate released the findings of a re-survey. “Five districts in each upper/lower limit are resurveyed as a measure of reconfirmation. Our results are in confirmation with the latest Indian Council of Medical Research survey,” said T. S. Selvavinayagam, Director of Public Health and Preventive Medicine.
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