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Vaccine Study Published Despite CDC Block
25 Jun
Summary
- Study shows vaccines 55% effective against hospitalizations.
- Vaccines 50% effective against ER/urgent care visits.
- CDC cited methodological concerns; experts defended study.

A study investigating the effectiveness of COVID-19 vaccines, which faced initial resistance from the Centers for Disease Control and Prevention (CDC), has now been published. The research, appearing in the JAMA Network Open journal on June 23, was initially withheld from the CDC's own journal earlier this year.
The study's findings reinforce existing knowledge, indicating that COVID-19 vaccinations are roughly 55% effective at preventing hospitalizations and about 50% effective at decreasing visits to emergency rooms or urgent care facilities. These figures were determined using a methodology that focuses on sick individuals and analyzes vaccination status.
Officials from the Department of Health and Human Services had expressed concerns regarding the study's methodological approach, suggesting it was prone to misleading results. However, many public health experts have since defended the study's framework, asserting its reliability and proven track record in measuring vaccine efficacy in numerous previously published studies within esteemed medical journals.