Stay up to date with notifications from The IndependentNotifications can be managed in browser preferences.Jump to contentThank you for registeringPlease refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged inAllNewsSportCultureLifestyleThe report had been cleared by the agency's Office of Science but was flagged by acting agency Director Jay Bhattacharya, said Althea Grant-Lenzy, the CDC's chief science officer, in a recent interview (AFP/Getty)A significant study on COVID-19 vaccine effectiveness, previously withheld from a government health journal, has now been published in JAMA Network Open. The research found the vaccine to be approximately 55% effective against COVID-19-associated hospitalizations and reduced emergency department and urgent care visits by 50%. The study's publication was initially blocked by political appointees within the Trump administration from appearing in a Centers for Disease Control and Prevention (CDC) journal. Acting CDC Director Jay Bhattacharya raised concerns about the study's 'test-negative design' methodology, arguing it was susceptible to false assumptions. Public health experts largely defend the methodology as a reliable and widely accepted approach for assessing real-time vaccine performance, especially during a pandemic. In fullBlocked COVID vaccine report finally emerges as critics demand answersThank you for registeringPlease refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in

Bhattacharya attacked study's test-negative design, a staple of vaccine effectiveness research

A study on COVID-19 vaccine effectiveness has been published after being blocked from a government health journal.

A study on COVID-19 vaccine effectiveness has finally been published after being blocked from a government health journal

Stay up to date with notifications from The IndependentNotifications can be managed in browser preferences.Jump to contentThank you for registeringPlease refresh the page or…

Covid-19 study approach, called "test-negative design", looks at people who were admitted to hospitals or visited emergency rooms with respiratory illnesses.

A study looking at the effectiveness of the COVID-19 vaccine was published after it was blocked from being included in a weekly report from the federal government.