novel coronavirus 2019-ncov. virus covid 19-ncp. coronavirus ncov denoted is single-stranded rna virus

19ncp 2019ncov 2020 abstract attention awareness background bacterium cells chinese concept corona coronavirus covid danger denoted design disease epidemic fever flu global health hospital illustration infection influenza infographic mask medical medicine mers ncov novel orange pandemic pathogen pattern poster prevention protect protection realistic red render research respiratory rna shape sick singlestranded symbol symptoms vector virus viruses warning wuhan