英文關鍵字
concept
control
disease
idea
immunization
inactivated
infection
injections
ipv
paralysis
polio
poliomyelitis
poliovirus
text
vaccination
vaccine
virus
word
英文關鍵字
concept
control
disease
idea
immunization
inactivated
infection
injections
ipv
paralysis
polio
poliomyelitis
poliovirus
text
vaccination
vaccine
virus
word