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

A covid vaccine study that the CDC’s chief halted this spring over methodological concerns was published Tuesday in JAMA ...

The findings suggest that Covid vaccines reduced the likelihood of severe illness last fall and winter.

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

A new study finds that flu shots were associated with moderate protection against the virus during the 2024-25 flu season.