Massive flu vaccine study seeks best shot for seniors

NCT ID NCT06506812

First seen Oct 31, 2025 · Last updated May 16, 2026 · Updated 26 times

Summary

This study combined data from two large trials in Denmark and Spain involving over 466,000 older adults to compare the effectiveness of a high-dose flu vaccine versus a standard-dose flu vaccine. The goal was to see which vaccine better prevents severe outcomes like hospitalization for flu or pneumonia. Researchers aimed to get clearer answers by pooling data from different countries.

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Contacts and locations

Locations

  • Center for Translational Cardiology and Pragmatic Randomized Trials, Department of Cardiology, Copenhagen University Hospital - Herlev and Gentofte

    Hellerup, Capital Region, 2900, Denmark

Conditions

Explore the condition pages connected to this study.