Coronavirus was in US by December 2019, NIH study finds

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A new government study shows that people in at least five states were infected with the coronavirus in December 2019 and early January 2020, providing more evidence that the virus was in the country earlier than previously believed.

A study of blood samples taken by the National Institutes of Health from January to March of 2020 found COVID-19 antibodies in two people from Illinois and Massachusetts who gave blood samples on Jan. 7 and Jan. 8.

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