• Dennis Thompson
• 12 Apr, 2021

Doctors might have figured out why AstraZeneca's COVID-19 vaccine may cause life-threatening blood clots in very rare cases. The discovery, made in a pair of reports published online Friday in the New England Journal of Medicine, could be key to the global rollout of the AstraZeneca vaccine, helping develop effective treatments for the side effect and providing clues on how to refine the vaccine and fix the problem, experts say.
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