Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
rsv respiratory syncytial virus coronavirus flu influenza cold disease lab laboratory rapid pcr rt-pcr antibody antigen sample nasopharyngeal throat swab nasal specimen result infection kit device card cassette negative positive analyze analyzing test testing medical atk exam covid-19 covid diagnosis epidemic sars vaccine vaccination technician glove