促进有效的疫苗战略将是下一阶段抗击 COVID-19 大流行的重中之重, 上海名医张文宏周一在新浪微博上写道. “有一定比例的病例，尽管接种了两剂疫苗，但病情严重，需要补氧. 但发病率 …

A swab is a small mass of absorbent material (such as cotton) wound around one end of a stick.The medical flocked swab is used for dressing or wiping on a certain area. It is usually used as a medical examination tool for collecting microorganisms, exfoliated cells or secretions. 与传统采样拭子相比, 植绒棉签有以下区别. 1. …