VAERS misuse: The zombie practice that keeps coming back

Helen Petousis-Harris, BSc, PGDipSci (Dist), PhD

Today’s episode: The one about the strokes after COVID-19 vaccine. An unscientific study misusing Vaccine Adverse Event Reporting System (VAERS) data has arisen from the crypt. The study jumps to alarming conclusions and even calls for a global halt on COVID-19 vaccines. Conspiracy theorists on social media snapped up the authors' dramatic claims and exaggerated risk with sensational figures. As in so many cases of deliberate generation of disinformation, this baloney has gone viral.

Understanding the role of observed vs. expected observational studies in vaccine safety

Helen Petousis-Harris, BSc, PGDipSci (Dist), PhD and Karin Batty, RN, PGDipPH (Dist)

Vaccines are a cornerstone of public health, providing protection against many infectious diseases. Vaccine safety monitoring is an important aspect of ensuring that vaccines are safe and effective. In this blog, we will discuss observed versus (vs.) expected observational studies, which are commonly used tools to actively monitor vaccine safety.