a test tube with a blood sample for examination and analysis. next to a protective medical disposable mask, a stethoscope and a thermometer. the concept of healthcare and medicine. detection of antibodies to the disease, vitamin deficiency. health check. - 生物危害標誌 個照片及圖片檔體檢
two male workers in chemical protection suits sanitizing bedroom against covid-19 - 生物危害標誌 個照片及圖片檔睡房, 職業
biological hazard symbol. icon on blue background - flat design with long shadow - 生物危害標誌 幅插畫檔、美工圖案、卡通及圖標
woman hands using the sewing machine to sew the face mask during the coronavirus pandemia. domestic sewing due to the shortage of medical materials. - 生物危害標誌 個照片及圖片檔防護口罩, 時尚物品
Manufacturing anti-flu vaccine, 19 February 1962. Photograph by Ralph showing the manufacture of an anti-flu vaccine [incubation in eggs]'.實驗室, 流感病毒