antibodies were found in the blood samples of the employees, who have taken the preventive or booster doses of Covid-19 vaccines as compared to the fully vaccinated employees.
It was the sixth regular sero-survey, but the first quantitative sero-survey that will prove useful for deciding about the future of vaccination, it said.
Additionally, the civic body claimed that it was probably the first of the kind sero survey conducted in the country and the second sero-survey of the same people will be conducted to count the antibody levels in their blood samples six months later, it said.
Of the 3,099 health and frontline workers, 726 employees were nurses and health workers from primary health centers in 24 wards of the BMC, 776 were Brihanmumbai Electric Supply and Transport (BEST) staffers and 779 were from solid waste management department, among others.