abstract
age
albino
campaign
caused
child
cloud
concept
coverage
develop
development
dose
effective
efficacy
efficiently
eradicate
formalin
found
illustration
immune
immunize
immunocompetent
immunologist
infection
infectious
influenzae
inoculation
keyword
keywords
mass
monkey
neomycin
number
outbreak
persons
pertussis
polio
polio vaccine
poliovirus
primary
protective
receive
recipients
reduce
refusals
refuted
remains
result
resurged
reversion
risk
roughly
small
substitutions
tag
tags
term
terms
tetanus
transmission
trial
typography
vaccine
varicella
virus
wild
word
words
year