A study on the first national sero surveillance to estimate the prevalence of the novel coronavirus, conducted in May, shows that as many as 8.56 lakh cases were present in the 233 districts deemed ‘zero-caseload’ at the time — confirming the under-detection of cases in the country.
The data also reveals that these districts may have actually accounted for a significant 13 per cent of the total Covid-19 caseload in May, two months after the first coronavirus case in the country.
The study, published in the Indian Journal of Medical Research on…