battle between immune system and covid coronavirus character in vibrant microscope universe. flirt, xec

covid19 coronavirus pandemic epidemic infection health flirt xec disease pathogenic contagious microbiology science particle molecular spread microscopic virus epidemiology outbreak medical virology contagion healthcare respiratory quarantine immunology immunity research vaccine prevention antiviral diagnostics transmission hygiene mask protection microbiome treatment spo2 pfizer sputnik moderna sarscov2 rna infectious pathology virological ai generated