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Coronavirus patients highly infectious for first 9 days, according to new study
coronavirus are most likely to be highly infectious for nine days after the onset of symptoms, a new study has found, reinforcing the need for self-isolation for at least 10 days.The peer-reviewed research, published in the Lancet medical journal on Thursday, analyzed hospitalized patients who had tested positive for the COVID-19 disease and found that the live virus, which causes infection, was not detected nine days after the symptoms started.