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June 23, 2026
CDC Vaccine Effectiveness Study Published After Controversy
- The study, published in JAMA Network Open, shows a 50% reduction in severe illness and 55% in hospitalizations among vaccinated adults during the last fall and winter.
- Political appointees previously blocked the study's publication in the CDC's journal due to concerns over its methodology, which has been defended by many public health researchers.
- The study utilized a 'test-negative design' to assess vaccine effectiveness, a methodology that has been criticized but is widely accepted in the field.
2 Sources
- Covid vaccine study the acting CDC director blocked is published in an outside journalJun 23, 2026 at 3:10 PM · NBC
- Blocked COVID vaccine report finally emerges as critics demand answersJun 24, 2026 at 8:15 AM · Independent