arm
artery
blood
blue
body
care
caucasian
clinic
closeup
cotton
donor
female
finger
giving
glove
green
hand
healthy
hold
hospital
human
illness
immunity
injecting
injection
loss
medical
needle
nurse
orange
pain
patient
person
plasma
pressure
prick
protection
science
sterile
syringe
taking
transfusion
vaccine
vein
voluntary
volunteering
white
woman
women
worker