unimmunized

/ˌʌnˈɪm.jə.naɪzd/
adjective
  1. Not having been made immune to a disease through vaccination.
    • Unimmunized children are at higher risk during outbreaks of measles.
    • Travelers to certain countries should check if they are unimmunized against yellow fever.
    • The school requires proof of vaccination for all unimmunized students.