More than 4 in 10 coronavirus cases are spread by those not obviously sick, study suggests

An article by ScienceNews reported People with coronavirus infections may be most contagious one to two days before they start to feel ill, new research suggests.

What’s more, considering pairs of people in which one person definitely caught the coronavirus from the other, scientists estimate that about 44 percent of COVID-19 cases may spread from person to person before symptoms appear.

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