3d illustration
abstract
aids
antigenic
attack
bacteria
bacterium
blood
bloodstream
body
cancer
cell
chemo
chemotherapy
danger
defend
defense
diagnosis
disease
examinations
fight
germs
health
hiv
illness
immune
infection
irradiation
leuko
leukocyte
malignancy
medical
microbe
microorganism
pathogen
protect
render
retrovirus
science
sick
sickness
spread
system
tcell
therapy
treatment
virulent
virus
war