Mumbai is India’s biggest city and consequently has been the most affected by the pandemic. The city’s slums are home to nearly 7 million people – almost the same population as the entire of Greater London, and ten times more densely packed than Manhattan.
A recent study found that more than half of the slum dwellers had been exposed to covid-19 and showed little or no symptoms.
Let that sink in.
Almost seven million people with access to only the most basic of sanitary facilities, if any, contracted the virus and survived. The fatality rate is just 1 – 1000 or 1 – 2000.
A mortality rate of between 0.001 and 0.0005 in a population that one would normally expect to be most at risk due to co-morbidities from diseases of poverty & malnutrition, with next to no access to medical facilities.
This suggests to me that exposure and immunity are somehow linked…