The emergence of the coronavirus in the United States was earlier than originally thought. Between December 13th and 16th, antibodies were detected in 39 samples from Washington, Oregon, and the west coast of California, and in Connecticut and Iowa. , Massachusetts, Michigan, Rhode Island and Wisconsin in 67 other samples detected antibodies. These samples were collected between December 30 and January 17. Researchers say these antibodies are specific for COVID-19 and exclude other coronaviruses. Among the 90 samples, 84 COVID-19-specific antibodies were detected.
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