Over 23 percent of national capital’s population got exposed to COVID19 and developed antibodies of novel coronavirus till the first week of July, as per a sero-surveillance study commissioned by the Ministry of Health and Family Welfare.

This study done by the National Center for Disease Control [ NCDC] in collaboration with Govt of National Capital Territory of Delhi, following a rigorous multi-stage sampling study design., said 23.48 per cent of the 21,387 samples collected across 11 districts of Delhi had antibodies against the COVID19.

The study was conducted from 27th of June 2020 to 10th July 2020.

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“The results of the sero-prevalence study show that on an average, across Delhi, the prevalence of IgG antibodies is 23.48 %. The study also indicates that a large number of infected persons remain asymptomatic,” the health ministry said in a statement.

For all the 11 districts of Delhi, survey teams were formed. Blood samples were collected from selected individuals after taking written informed consent and then their sera were tested for IgG antibodies and infection using COVID KAVACH ELISA approved by Indian Council for Medical Research [ICMR]. It is one of the largest sero-prevalence studies conducted in the country using the ELISA testing, it further said.

Antibody testing repeatedly done over time i.e. sero-surveillance, generates important evidence for assessing the spread of the pandemic from time to time.

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