3d
aggression
aid
ameba
amoeba
bacteria
bacterium
biology
blue
cell
colony
danger
dirty
disease
epidemic
flu
harmful
health
healthcare
hiv
illness
infection
macro
medical
medicine
microbe
microbiology
microscopic
nocuous
organic
organism
outbreak
pathogen
poisonous
problem
protozoan
research
science
scientific
sickness
spread
toxic
veterinary
virus
vitality