jn.1 covid-19 omicron subvariant virus, in the respiratory system

virus variant covid coronavirus jn1 pirola microscopic cells pathogen immune response infection red blood biology imnologic healthcare disease medicine microbiology scientific research contagion pathogenesis variation flu biomedical microorganisms cellular microscope virology pandemic antigen biochemistry laboratory immunology bacteria corona antibodies diagnostic mutation mutate molecular invasive biological biotechnology detailed microbe transmission closeup human miscroscopic