More than half of Mumbai`s slum residents might have had Covid-19. Here`s why herd immunity ...
(WorldNews Europe)

(CNN)Last month, researchers in one of India`s largest cities made a surprising discovery. Of the nearly 7,000 blood samples taken from people in Mumbai`s slums, 57% tested positive for coronavirus antibodies. While some were alarmed by the results of the study conducted by the Mumbai authorities and the Tata Institute of Fundamental Research, others were optimistic. Mumbai`s slums, where social distancing is nearly impossible, might now have some of the highest levels of immunity in the world -- only 23.5% of samples taken by India`s National Center for Disease Control tested positive for antibodies in Delhi and 14% tested positive in New York, in a study sponsored by the New York State...