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Bombshell Study Reveals 27% Negative Efficacy of 2024-2025 Influenza Vaccine Among Working-Age Adults

Groundbreaking Cleveland Clinic study finds flu vaccine may heighten, not reduce, infection risk in healthy adults.

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Sayer Ji
Apr 07, 2025
∙ Paid

A newly released preprint study from the Cleveland Clinic has sparked international attention by reporting that the influenza vaccine for the 2024–2025 season was not only ineffective among a large population of working-age healthcare employees—it was associated with a higher risk of infection.

The prospective cohort study, titled "Effectiveness of the I…

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