The serum flow profile of pneumonia in COVID-19 shows that the population in China is generally at a low infection level in SARS-CoV-2. 신화통신에 따르면, Beijing, 12월 29 (Reporter Tian Xiaohang Mu Tiecheng), the reporter learned from the Chinese Center for Disease Control and Prevention that one month after China curbed the first wave of COVID-19 pneumonia, …