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Study supports cardiovascular safety of Pfizer vaccine older seniors

Phase 3 clinical trials of the Pfizer coronavirus vaccine showed no links to cardiovascular problems.

But more research is needed to confirm heart and circulatory safety in people who were not well represented in those studies, including older seniors.

Almost a year ago, Pfizer's SARS-CoV-2 vaccine became the first to receive emergency use authorization.

It remains the most widely-used coronavirus vaccine in many countries, including France.

A study of people ages 75 and older admitted to French hospitals finds no increase in heart attacks, strokes or breathing problems caused by blood clots or blockages in the two weeks after each vaccine dose.

The findings, published in the journal JAMA, are consistent with studies in the U.S. and Israel of those conditions during the 42 days and 21 days following vaccination.

The authors call for more research in under-studied populations. 

Nicholas Gerbis joined KJZZ’s Arizona Science Desk in 2016. A longtime science, health and technology journalist and editor, his extensive background in related nonprofit and science communications inform his reporting on Earth and space sciences, neuroscience and behavioral health, and bioscience/biotechnology.Apart from travel and three years in Delaware spent earning his master’s degree in physical geography (climatology), Gerbis has spent most of his life in Arizona. He also holds a master’s degree in journalism and mass communication from Arizona State University’s Cronkite School and a bachelor’s degree in geography (climatology/meteorology), also from ASU.Gerbis briefly “retired in reverse” and moved from Arizona to Wisconsin, where he taught science history and science-fiction film courses at University of Wisconsin-Eau Claire. He is glad to be back in the Valley and enjoys contributing to KJZZ’s Untold Arizona series.During the COVID-19 pandemic, Gerbis focused almost solely on coronavirus-related stories and analysis. In addition to reporting on the course of the disease and related research, he delved into deeper questions, such as the impact of shutdowns on science and medicine, the roots of vaccine reluctance and the policies that exacerbated the virus’s impact, particularly on vulnerable populations.