19
analysis
assistant
bacteria
biological
check
child
childhood
clinic
coli
comparison
diagnosis
disease
dna
doctor
examination
genetics
girl
gloves
health
hospital
immunity
infection
laboratory
mask
material
medical
mouth
negative
nurse
pandemic
pediatrician
polyclinic
portrait
positive
protective
reception
reproduction
research
result
shelf
taking
test
tube
virus
woman
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