The sero-prevalence in healthcare workers was 87.14 percent. : Pre-configured baskets of stocks & ETFs that you can invest in with a single click. Developed by hedge funds, global asset management companies, experienced wealth management firms and portfolio managers. Curated markets data, exclusive trading recommendations, Independent equity analysis & actionable investment ideas Nearly 90 percent of Mumbai's population has antibodies against COVID-19, the latest serosurvey by Brihanmumbai Municipal Corporation (BMC) has revealed. In slums, the sero-prevalence was 87.02 percent, while it was 86.22 percent in other areas, the BMC said.