new infectious flurona twindemic desease of flu influenza and corona covid-19, ncov and omicron variant samples in lab tubes

2019ncov background blood combined concept corona coronavirus covid covid19 dangerous desease diagnosis diagnostic disease doc epidemic flask flu flurona flurone health hospital illness infection infectious influenza inscription lab laboratory latex light lockdown mask medical medicine mutation ncov new omicron pandemic quarantine research sample samples science scientist tube tubes twindemic vaccination vaccine variant virus word