illustration of original virus and proteins, altered proteins in virus after antigenic shift, and virus after antigenic drift - 抗原 幅插畫檔、美工圖案、卡通及圖標病毒, 改變
covid-19 rapid diagnostic test kit with hand holding pipette and placing sample on test cassette. - 抗原 幅插畫檔、美工圖案、卡通及圖標水滴, 冠狀病毒
medical illustration depicting immune system interaction at cellular level. - 抗原 幅插畫檔、美工圖案、卡通及圖標小徑, 開始鈕, 巨噬細胞