variant virus, coronavirus, spike protein. omicron. covid-19 seen under the microscope

aerial brooklyn buildings business care cell chain clinic corona coronavirus covid covid19 delta diagnostic disease epidemic flu health hospital illness infection lab laboratory manhattan map medical medicine microscope mutation nasal new nurse nyc omicron oral outbreak pandemic patient polymerase prevention protective protein quarantine reaction rendering sample sars sarscov2 science seen specimen spike streets swab test vaccination vaccine variant view virus york