20s
analysing
blood
blood group
blood type
caucasian
close up
cure
gloves
group ab
health
holding
horizontal
infection
lab
lab coat
label
laboratory
male
man
medical
medicine
men
microscope
occupation
one person
people
person
pharmaceutical
phlebotomist
phlebotomy
researching
sample
science
scientist
studying
test tube
testing
twenties
type ab
vaccine
variant
white coat
worker
working