A study of more than a half-million people in India who were exposed to the novel coronavirus SARS-CoV-2 suggests that the virus’ continued spread is driven by only a small percentage of those who become infected. Furthermore, children and young adults were found to be potentially much more important to transmitting the virus — especially within households — than previous studies have identified, according to a paper by researchers from the United States and India published Sept. 30 in the journal Science. Researchers from the Princeton Environmental Institute (PEI), Johns Hopkins University and the University of California, Berkeley, worked with public health officials in the southeast Indian states of Tamil Nadu and Andhra Pradesh to track the infection pathways and mortality rate of 575,071 individuals who were exposed to 84,965 confirmed cases of COVID-19, the disease caused by SARS-CoV-2. It is the largest contact tracing study — which is the process of identifying people who came into contact with an infected person — conducted in the world for any disease. To read the full story.
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