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Continue to ChatUS: Vaccination hesitancy threatens to hamper herd immunity efforts https://www.newsbuyback.com/2021/07/us-vaccination-hesitancy-threatens-to-hamper-herd-immunity-efforts/
US: Vaccination hesitancy threatens to hamper herd immunity efforts https://www.newsbuyback.com/2021/07/us-vaccination-hesitancy-threatens-to-hamper-herd-immunity-efforts/