background
bacteria
bag
bin
biology
blood
care
contaminated
danger
dangerous
dirty
disposable
disposal
equipment
garbage
gauze
hair
hazard
health
hospital
illness
infect
infectious
medical
medicine
messy
operating
operating room
patient
plastic
red
risk
room
rubbish
safety
shave
sick
stained
surgeon
surgery
surgical
tool
trash
unclean
used
waste
wet
white
work