CDC leadership continues to try to manufacture a scientific debate on vaccines where none exists - Report - MDSpire

CDC leadership continues to try to manufacture a scientific debate on vaccines where none exists

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  • Ben Lopman

  • July 2, 2026

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CDC Leadership Attempts to Create a Scientific Discourse on Vaccines

Overview

The CDC's recent seminar on measuring vaccine effectiveness focused on the test-negative design (TND) for assessing vaccine performance, which was discussed by agency leaders.

Background

Understanding vaccine effectiveness is crucial for public health, particularly in monitoring the performance of vaccines against diseases like Covid-19, flu, and RSV. The CDC's evaluation of vaccines relies on methodologies such as the TND, which is essential for real-time surveillance.

Data Highlights

No numerical data was provided in the source material.

Key Findings

  • The CDC's Grand Rounds focused on the principles of real-world vaccine studies and their methodologies.
  • The test-negative design (TND) is a primary method for assessing vaccine effectiveness, comparing vaccinated and unvaccinated individuals with similar illnesses.
  • Concerns were raised about the validity of TND by some CDC leadership, which could impact ongoing vaccine performance monitoring.
  • Panelists emphasized the importance of understanding the limitations of vaccine effectiveness studies.
  • Blocking the publication of a CDC study on Covid vaccine effectiveness indicates internal conflicts regarding vaccine evaluation methodologies.

Clinical Implications

The ongoing discussions within the CDC regarding vaccine effectiveness methodologies may influence the agency's assessments of vaccine performance.

Conclusion

The discussions at the CDC's seminar centered on the methodologies for evaluating vaccine effectiveness.

Related Resources & Content

  1. Drug Safety, 2018 -- Response to "An Updated Review on the Safety of Human Papillomavirus Vaccines"
  2. Stat News, 2026 -- How to restore credibility to the CDC’s vaccine advisory committee
  3. Journal of General Internal Medicine, 2026 -- Evidence in All Policies: Restoring Science to Public Health and Clinical Decision-Making
  4. JAMA Network Open, 2023 -- Decision Aids for Vaccination in an Era of Medical Freedom
  5. CDC, 2025 -- 2025–2026 COVID-19 Vaccination Guidance
  6. CDC, 2025 -- Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices
  7. CDC, 2024 -- Use of Respiratory Syncytial Virus Vaccines in Adults Aged ≥60 Years: Updated Recommendations of the Advisory Committee on Immunization Practices
  8. 2025–2026 COVID-19 Vaccination Guidance | Covid | CDC
  9. Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices — United States, 2025–26 Influenza Season

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