CDC "작년 중국 코로나19 발표 전 미국 내 확진자 있었다"<br /><br />COVID-19 could have been in the U.S. well before the country's first reported case and even before it was officially identified in China.<br />On Monday, scientists from various U.S. institutions including the CDC, published a study based on blood samples collected by the American Red Cross from nine states.<br />From there, 106 samples collected between December 13th and January 17th showed evidence of the virus.<br />This is a few weeks earlier than the first case reported from Wuhan, China, where scientists believe the virus originated.<br />The first time the U.S. officially reported a case was January 19th.<br />The results suggest that the virus had been spreading around the world before it was officially identified.<br />
