Which flu shot works best for seniors? major hong kong study reveals answers

NCT ID NCT03330132

First seen May 24, 2026 · Last updated Jun 12, 2026 · Updated 6 times

Summary

This study tested different types of flu vaccines in 1,861 older adults (ages 65-82) in Hong Kong over four years. The goal was to see which vaccine or combination of vaccines gave the strongest and longest-lasting immune protection. Researchers measured antibody levels in the blood to compare standard, high-dose, and adjuvanted vaccines.

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Contacts and locations

Locations

  • The University of Hong Kong

    Hong Kong, China

Conditions

Explore the condition pages connected to this study.