Thrombocytopenia
Rare side effect more frequent after adenovirus-based covid-19 vaccine than after mRNA vaccine
AstraZeneca’s adenovirus-based covid-19 vaccine is associated with a 30 percent increased risk of the rare side effect thrombocytopenia, or too few platelets, compared to Pfizer’s mRNA covid-19 vaccine. This has been confirmed by research coordinated by Erasmus MC’s Department of Medical Informatics, published in The BMJ.