Health officials nix publication of study on Covid vaccine effectiveness

Key Points:

• U.S. health officials halted the publication of a CDC study on Covid-19 vaccine effectiveness in preventing hospitalizations, citing methodological concerns despite prior scientific review and editorial approval.
• The study, intended for the CDC’s Morbidity and Mortality Weekly Report, used a common approach comparing vaccination status among hospitalized patients, concluding the vaccine reduced emergency visits and hospitalizations by about half.
• HHS officials raised issues about the methodology related to factors like prior infection and care-seeking behavior, but many experts argue the approach is widely accepted and appropriate for real-time vaccine effectiveness estimates.
• The decision to stop publication has sparked criticism from public health advocates and lawmakers, who warn that political interference in scientific reporting could undermine public trust and have serious health consequences.
• Concerns about political influence on CDC publications have a history, with previous disruptions during the Trump administration and ongoing debates about maintaining objective, timely public health information.