3d
3d rendering
bacteria
bacterial infection
bacterium
biology
blood
blood cells
cell
cells
concept
disease
epidemiology
germ
health
human
illness
illustration
infect
infected
infection
infectious
influenza
medical
medicine
microbiology
microorganism
microorganisms
microscopic
molecule
molecules
organic
organism
outbreak
red
science
scientific
sickness
viral
virology
virus