Promoting an efficient vaccine strategy will be the top priority in the next phase of the fight against the COVID-19 pandemic, renowned Shanghai doctor Zhang Wenhong wrote on his Sina Weibo account on Monday. “There is a certain proportion of cases whom despite receiving two doses of the vaccine developed severe conditions that require oxygen supplementation. But the incidence of …
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. Compared with traditional sampling swab, flocking swab has the following differences. 1. …