3d
active
antibodies
antibody
antigen
attack
b
background
bacteria
biology
blood
blymphocyte
cancer
cell
cells
defense
disease
erythrocyte
health
human
illustration
immune
immunity
immunotherapy
infection
infectious
leukocyte
leukocytes
lymphocyte
lymphocytes
macro
medical
medicine
microbiology
microscopic
receptor
red
research
science
system
t
tlymphocyte
tumor
virus
white