标题: Coronavirus was present in US earlier than initially thought: Study [打印本页] 作者: lixue123 时间: 2021-3-29 02:41 标题: Coronavirus was present in US earlier than initially thought: Study
A study published Monday in the journal Clinical Infectious Diseases conducted by researchers with the Centers for Disease Control and Prevention suggests that the novel virus was present in the United States as early as mid-December 2019.
