Two nationally recognized scientists, with decades of experience advising United States vaccine policy, are calling for a shift in how vaccine effectiveness is measured. They argue that relying solely on clinical trials is a mistake, as these trials often fail to capture the full scope of how vaccines perform year to year in real-world scenarios.
The Value of Observational Data
The experts suggest that well-designed observational studies should be integrated into the evaluation process. While clinical trials remain the gold standard for initial safety and efficacy, observational studies provide critical insights into long-term performance and how vaccines interact with evolving viral strains in diverse populations.
By excluding this data, policy makers may be missing the "whole story," potentially leading to gaps in understanding how well immunization programs are working on a continuous basis. The scientists emphasize that a multi-faceted approach is essential for robust public health strategies.
