Trump official blocks release of CDC study on COVID vaccine benefits

On 2026-04-09, acting CDC director Jay Bhattacharya blocked the scheduled publication of a CDC COVID-19 vaccine study in the agency’s Morbidity and Mortality Weekly Report. According to the article, CDC scientists said the study had completed standard scientific review and showed vaccine benefits, but publication was withheld over methodology concerns. The action occurred in Washington, DC and affected dissemination of public health information.