coronavirus covid-19 2019-n-cov warning. abstract virus strain model. novel coronavirus is crossed out with red stop sign

2019ncov attention background bacteria biohazard caution cell china concept contagious contamination corona coronavirus danger dangerous diagnostic disease epidemic flu germ global health healthcare herpes illness illustration infected infection infectious influenza medical medicine microbe microbiology microscope pandemic pathogen pathology pneumonia quarantine respiratory science sign stop symbol vector virus warning wuhan