respiratory mask on desk in office, protective medical mask with 2019-ncov, coronavirus protection concept. - 2019冠狀病毒病 個照片及圖片檔防護口罩, 羅馬尼亞, 無人
In this photo illustration, Ruth Jones, Immunization Nurse, holds a Pfizer-BioNTech COVID-19 vaccine at Borinquen Health Care Center on May 29, 2025...美國, Bestpix
vials with the covid-19 vaccine and syringes are displayed on a tray at the corona vaccination center - 2019冠狀病毒病 個照片及圖片檔注射疫苗, 藥水瓶
young man and young woman in urban environment using protective face masks - 2019冠狀病毒病 個照片及圖片檔氣候變化, 空氣污染, 防護口罩
Clinical support technician Douglas Condie extracts viruses from swab samples so that the genetic structure of a virus can be analysed and identified...實驗室, 病毒, 英國
This illustration, created at the Centers for Disease Control and Prevention , reveals the ultrastructural morphology exhibited by coronaviruses....病毒, 氨基酸