Virus May Have Arrived in U.S. in December, but Didn ’t Spread Until Later

Blood samples collected in mid-December indicate possible infections more than a month before the known first case of Covid-19, but do not show community transmission.
Source: NYT Health - Category: Consumer Health News Authors: Tags: Coronavirus (2019-nCoV) Antibodies Blood Donation American Red Cross Clinical Infectious Diseases (Journal) University of Washington United States Source Type: news