The first and second serosurvey results of COVID-19 antibodies in Dharavi and Cuffe Parade slums (Mumbai, India) were studied. The seroprevalence data of the slums explained the zero novel coronavirus cases reported in the slum dwellers verified first in real on the ground the concept of much-needed herd immunity against the pandemic. First, serosurvey data showed that more than half  (57%)  of the population of  Dharavi was infected with the virus. The antibodies were waned off in two months time and diminished to 45%, as found in the second survey conducted after two months of the first survey. 

The story was under-researched by Zameer Shervani, Dr. Deepali Bhardwaj, and Roma Nikhat. The present research article has verified first the herd immunity concept aimed at eradicating the   COVID-19 pandemic from the globe. Antibodies developed in the population Dharavi slums(Mumbai, India) slowed down and nearly stopped the spread of novel coronavirus infection in the locality.  

Antibodies developed in the population of Dharavi slums slowed down and nearly stopped the spread of novel coronavirus infection in the locality.

The antibody prevalence was highest at 75% in the Cuffe Parade slums of Mumbai. Initially, Dharavi slums were a hotspot of novel coronavirus which later became nearly a no-new infection zone. The herd immunity acquired in Dharavi residents stopped the new infection. One million Dharavi slum dwellers living in a  crowded semi-isolated cluster mimic the petri-dish model of a  human population which is now a  near COVID-19 free zone due to the presence of antibodies in the residents. The infection rate in  Maharashtra,  India,  and  Dharavi slums was compared. The concept of herd immunity that occurred on the ground in real has been first established.

This is an example of a virus spread in a semi-closed and crowded place. The infection rate in the slums has been investigated versus the seroprevalence in the population. 

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