30s
biology
biotechnology
black
camera
chemical
chemist
chemistry
employee
equipment
focus on background
health
hospital
industry
job
lab
laboratory
looking
looking at camera
machinery
male
man
mask
medical
medicine
microbiology
occupation
people
personnel
persons
pharmaceutical
pharmacy
plant
profession
professional
protection
research
researcher
science
scientific
scientist
staff
technician
technology
uniform
vaccine
work
worker
working