bacterium
biology
biomedical illustration
blood
cell
closeup
color image
computer generated image
concepts
condition
coronavirus
covid19
danger
death
disease
drug
epidemic
flu infectious disease
guangzhou
healthcare and medicine
horizontal composition
infectious disease
laboratory
lung
magnification
medical examination
medical research
medical sample
microbiology
microorganism
microscopic animal
middle eastern coronavirus respiratory syndrome
pathogen
photography image
pneumonia virus
science
symptom
threedimensional
to sneeze
to spread
unhealthy life
viral infection
virus
without people