microscopic view of bacterial pneumonia. bacterial pneumonia is a type of pneumonia caused by bacterial infection. - 肺炎球菌 幅插畫檔、美工圖案、卡通及圖標
medical illustration showing pneumonia in the alveolus of human lungs. - 肺炎球菌 幅插畫檔、美工圖案、卡通及圖標肺炎, 肺泡, 傳染病