How was Delhi sero-survey done?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.Results of Delhi sero-surveyNotably, the study also indicates that a large number of infected persons remain asymptomatic.
This implies the following:1. Nearly six months into the epidemic, only 23.48 per cent of the people are affected in Delhi, which has several pockets of dense population.2.