PARIS, April 15 — People infected with the new coronavirus may start spreading the virus several days before they have any noticeable symptoms, according to a new modelling study published today. The study comes as nations have broadened restrictions aimed at curbing the epidemic, amid concerns...
Wednesday, 15 Apr 2020 10:54 PM MYT
The study comes as nations have broadened restrictions aimed at curbing the epidemic, amid concerns over patients who may be infectious despite not showing signs of ill health. But the new study suggests that even those who get visibly sick may be highly infectious before the onset of symptoms. They found that the patients, none of whom were classed as severe or critical, had the highest viral load soon after the onset of symptoms, which then gradually decreased.
The authors inferred that infectiousness started 2.3 days before symptoms appeared and was at its peak at 0.7 days before the first signs of illness—although they cautioned that pinpointing the exact timing of the onset of symptoms relied on patient memory. Javid added that several studies had now suggested that a large number of patients shed the virus before they show signs of illness and said the findings are “likely to be real and robust”.
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