Vaccination herd effect experience in Latin America: a systematic literature review.

Hum Vaccin Immunother · 2019 · PMC6363147 · PMID 30230953

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did not reach statistical significanceno p-value reported

In Uruguay, there was a reduction in consolidated pneumonia hospitalizations in children aged 36–59 months from 741 per 100,000 to 633 per 100,000 that did not reach statistical significance. 36 Additional data from the same study reported no decrease in hospitalizations in children aged 5–14 years, suggesting no herd protection effect in this age group.

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