area
background
bacteria
bacterial
bio
biohazard
biologic
biological
biology
cancer
chemical
contagious
contaminated
contamination
danger
dangerous
disease
environment
epidemic
experiment
hazard
health
icon
illustration
industrial
infected
lab
label
medical
medicine
pictogram
poison
pollution
protect
protection
radiation
restricted
risk
safety
security
set
sign
sticker
substance
symbol
toxic
virus
waste
zone