coronavirus on the white background. covid-19. medical genetics bacteriological microorganism.

abstract antibiotics asian avian background bacterial bacteriological bacterium biology bird concept contagious coronavirus covid covid19 diagnosis diseases epidemic fever flu genetics green health human illness immunity infect infection influenza isolated lethal medical microbe microbiology microorganism new outbreak pandemic pathogen pathogenic pathology retrovirus rgb sars science sickness strain superbug symptoms texture treatment vaccine vector virology virus white