U.S. Health Officials Halt Publication of COVID-19 Vaccine Effectiveness Study Amid Methodology Dispute
U.S. health officials have stopped the publication of a study that evaluated the effectiveness of COVID-19 vaccines in preventing hospitalizations and emergency room visits. The study, which was set to be published in the Centers for Disease Control and Prevention's (CDC) Morbidity and Mortality Weekly Report, concluded that the vaccine reduced ER visits and hospitalizations by about half among healthy adults during the past winter. The decision to halt the publication was confirmed by a U.S. Department of Health and Human Services spokesman, citing concerns over the study's methodology. This methodology, which involves comparing the odds of a positive COVID-19 test among vaccinated and unvaccinated patients, has been used in other reputable journals. However, HHS officials argue that factors such as prior infection and patient behavior could affect the results. 
