Flu shot mystery: why some seniors keep antibodies longer
NCT ID NCT02401893
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at why some older adults (age 50 and up) maintain flu-fighting antibodies longer after getting the flu vaccine. Researchers enrolled 510 people and measured their immune response over time. The goal was to understand factors that help maintain protection, not to test a new treatment.
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Conditions
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