Mumbai: 75% test positive for Covid-19 antibodies, sero survey finds

Conducted between October 5 and 10 at five locations in the ward, the tests showed that 75% of the population tested positive for Covid antibodies–much higher than the Brihanmumbai Municipal Corporation’s (BMC) seroprevalence results of 45% in slums and 18% in buildings.

A statement from Eyebetes said the slums they covered in the sero survey were not covered by the BMC study.

The report added that only eight out of the 806 patients who were tested – one percent – reported having tested positive for Covid-19 in the past.

“This means that either 99 % of our cohort had an asymptomatic infection or that people are unwilling to share information about previous coronaviru infections. A total of 31 people – four percent – did not want to answer a question on whether they had coronavirus in the past, pointing to the stigma attached to the virus,” the statement read.

The study further stated that 78 % of the population aged between 18 – 40, 74 % of those aged between 40 – 60 and 76% of those aged over 60 tested positive for Covid-19 antibodies.

Among those tested in the survey, sero-prevelance among women was 79.3 %, as compared to 70.8 % among men.

“In most cases, males have a higher rate of seroprevalence. In our study the higher rate for women could suggest that post the lockdown, many more women may be congregating in the slums, leading to a spike in infection,” the report added