Tamil Nadu sero survey: COVID-19 antibodies detected in 23% of people tested

While the overall seroprevalence across the state was 23%, it was found to be highest in the districts adjoining Chennai - Tiruvallur (49%), Chengalpattu (43%) and Kanchipuram (38%).

Chennai: A sero survey conducted by the Tamil Nadu government showed that nearly 23 per cent of the tested samples had IgG antibodies against SARS-CoV-2 virus, the infection that causes COVID-19. The state-wide survey was conducted in April this year across all districts of the state, except Chennai. Based on 765 clusters, with each consisting of 30 individuals, the samples were taken at random from villages or streets urban areas. Completed under the supervision of Dr T.S. Selvavinayagam, Director of Public Health and Preventive Medicine, this survey showed that 5316 individuals of the total 22904 participants had COVID antibodies.