negative result of sars-cov-2 covid-19 coronavirus rapid antigen ag test done by a nasal swab

negative result sars-cov-2 rapid antigen test nasal swab held medical personnel covid-19 coronavirus isolated blurred background pandemic analyzing antigen care cassette contagion contagious contamination corona coronavirus global crisis covid-19 diagnosis diagnostic disease epidemic equipment hand health hospital test hubei illustrative infection isolated lab laboratory medical medicine negative outbreak pandemic patient patient tested pneumonia rapid result sample sars ag selective focus specimen swab kit viral virus virus spread