close-up of red virus particles with spiky surface in motion. hmpv, human metapneumovirus

metapneumovirus hmpv human virus particles red spiky surface closeup motion microscopic biology disease infection pathogen microbe viruscell healthcare science contagious microscopicview microscopicworld medical research microbiology danger healthcaresystem epidemic lab prevention pneumonia symptoms clinical close microorganisms germs bronchitis viral medicine contagiousness immunity respiratory virologyresearch threat immune cough pandemic fever ai generated