coronavirus ncov denoted is single-stranded rna virus

19ncp 2019ncov attention background bacterium biohazard caution cells china chinese clinic concept corona coronavirus covid covid19 danger dangerous death denoted disease disinfection epidemic flu global hazard health icon illustration infect infected infection inscription medical medicine mers merscov ncov novel organism outbreak pandemic pathogen pneumonia protection quarantine realistic red risk rna safety sars singlestranded strain symbol syndrome typography vaccine vector virus white who wuhan