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Modeling study projects rotavirus hospitalizations rise if vaccine coverage drops to 20% in US

Modeling study projects rotavirus hospitalizations rise if vaccine coverage drops to 20% in US
Photo by Navy Medicine / Unsplash
Key Takeaway
Consider maintaining high rotavirus vaccine coverage to prevent projected hospitalization increases within two to three years.

This modeling study evaluates the potential impact of reduced rotavirus vaccination rates on hospitalization burdens across the United States and representative states. The analysis focuses on a scenario where vaccine coverage declines to 20% compared to current recommendations involving shared clinical decision-making. The projected timeframe for these outcomes spans from July 2026 to June 2031.

The primary outcome assesses the number of rotavirus hospitalizations under these conditions. Authors report that hospitalizations are likely to increase within two to three years following a drop in vaccine coverage. The model estimates that over 200,000 hospitalizations could occur if coverage falls to the specified threshold.

The certainty note indicates these findings are likely rather than definitive. Safety data regarding adverse events were not reported in this analysis. The study does not provide specific p-values or confidence intervals for the projected numbers. Modeling inherently relies on assumptions that may not reflect real-world variability.

Clinicians should recognize the potential burden on healthcare systems if vaccination rates decline. Maintaining high coverage remains critical to preventing the projected surge in hospitalizations. Public health efforts must address barriers to vaccination to avoid the modeled outcomes. Future surveillance will be needed to validate these projections against actual epidemiological data.

Study Details

EvidenceLevel 5
PublishedApr 2026
View Original Abstract ↓
In January 2026, the United States Department of Health and Human Services downgraded the recommendation for infant immunization with rotavirus vaccine to one of shared clinical decision-making. We use a validated model for the transmission dynamics of rotavirus to predict the magnitude and timing of increases in the number of rotavirus hospitalizations in the US and in representative states given possible decreases in vaccine coverage. Rotavirus hospitalizations are likely to increase within two to three years following a drop in vaccine coverage, resulting in over 200,000 hospitalizations between July 2026-June 2031 if coverage were to drop to 20%. The burden is likely to fall disproportionately on southern states that currently experience higher rates of rotavirus hospitalization.
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