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From eNewsletter 4/30/2025

DID YOU KNOW that Cleveland Clinic funded a study of their employees to gauge the effectiveness of the influenza vaccine during the 2024-2025 respiratory viral season?

These are direct quotes from the pre-published study in Medrxiv:

"The cumulative incidence of influenza was similar for the vaccinated and unvaccinated states early, but over the course of the study the cumulative incidence of influenza increased more rapidly among the vaccinated than the unvaccinated. In an analysis adjusted for age, sex, clinical nursing job, and employment location, the risk of influenza was significantly higher for the vaccinated compared to the unvaccinated state, yielding a calculated vaccine effectiveness of −26.9%."

"Summary - Among 53402 working-aged Cleveland Clinic employees, we were unable to find that the influenza vaccine has been effective in preventing infection during the 2024-2025 respiratory viral season."

To read the rest of today's issue, please go to this page.