The findings of the initial round of a serological survey conducted by the Brihanmumbai Municipal Corporation, Niti Aayog and Tata Institute of Fundamental Research were released yesterday. The results showed that an estimated 57 % respondents in slums and 16 % people from residential societies are exposed to coronavirus.<br />'' <br />''The serological survey, which looks for antibodies in the blood, was carried out in the Chembur, North Wadala and North Dahisar areas in the first week of July and 6,936 samples were collected. Overall, the sero-survey found that 40 per cent had had the coronavirus infection. A surprise finding of the survey is that more women had been infected than men. This survey also showed that Mumbai has one of the highest sero prevalence recorded by cities.<br />'' <br />''It also showed that the infection fatality rate is quite low at 0.05% to 0.1%, meaning the virus is not as fatal in the city as it has been worldwide. The expert associated with the survey said that shared facilities like toilets, high population density and lack of physical distancing may be the reasons why those living in slums were 3.5 times more exposed to the virus than people living in housing societies. <br />