Female practitioner doctor takes pcr test nose swab of small patient

nasal swab severe acute respiratory syndrome protective face mask pediatric nurse illness prevention infectious disease healthcare worker heathcare medical test medical procedure virologist medical exam medical occupation cold and flu doctor patient epidemic medical examination room virus medical research illness nurse coronavirus hospital prevention medical clinic medicine pandemic nose examining protection virology child cotton swab stem - topic laboratory symptom 4k occupation african american american culture research african ethnicity microbiology ethnicity childhood small offspring pcr device people boys cotton women adult risk covid-19 spain