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October 15. Health officials think the spike is due largely to the waning protection of pertussis vaccinations received earlier in childhood . In this sentence, vaccinations means: Reverberations Emergencies Inoculations Vacancies.
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October 15 Health officials think the spike is due largely to the waning protection of pertussis vaccinations received earlier in childhood. • In this sentence, vaccinations means: • Reverberations • Emergencies • Inoculations • Vacancies