Study Shows that Asymptomatic Cases Carry the Same Amount of Virus

People who are infected with the coronavirus carry similar levels of the pathogen in their nose, throat and lungs whether they have symptoms or not, a new study from South Korea showed Thursday.

The paper, published in JAMA Internal Medicine, is an important biological line of evidence in support of the idea that asymptomatic carriers can spread COVID-19.

Until now, experts have relied on inferring asymptomatic spread when people contract the virus without contact with a known carrier.

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