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10. Thrombocytopenia

The AstraZeneca vaccine uses an adenovirus vector, rather than mRNA technology like the Moderna and Pfizer-BioNTech vaccines. Because of this, its side effects vary slightly in comparison. One of the rarer, more serious side effects is thrombocytopenia or low blood platelet counts. If platelet counts fall too low, internal bleeding may occur and the condition is sometimes fatal.

Blood sample for platelet count
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