April 20, 2021

expert reaction to the EMA finding a possible link between the Janssen COVID-19 vaccine and very rare cases of unusual blood clots with low blood platelets

The European Medicines Agency (EMA) has published a press release stating it finds a possible link between the Janssen COVID-19 vaccine and very rare cases of unusual blood clots with low blood platelets, but confirms that overall benefit-risk remains positive.

Prof Jonathan Ball, Professor of Molecular Virology, University of Nottingham, said:

“These side effects are very similar to those reported for Astra Zeneca COVID-19 vaccines, which does suggest that it is the inactivated Adenovirus delivery system that might be causing the problems.  It’s important to remember though, that in most people the benefits of these vaccines far outweigh the risks – these are incredibly rare potential side-effects.”

EMA Press release: https://www.ema.europa.eu/en/news/covid-19-vaccine-janssen-ema-finds-possible-link-very-rare-cases-unusual-blood-clots-low-blood

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