COVID-19 was spreading in the US by December 2019, mounting evidence suggests

The virus was already lurking here at least a month before the country’s first reported case, according to a new study. The novel coronavirus may have already arrived in the U.S. by late December 2019, adding to the evidence that the virus was already lurking here at least a month before the country’s first reported case, according to a new study. The study researchers analyzed more than 24,000 blood samples collected in the U.S. from Jan. 2 to March 18, 2020, as part of the National Institutes of Health’s All…