How some COVID vaccines triggered rare blood-clot disorder

Nature

by Mohana Basu

February 13, 2026

Researchers identify genetic mutation in small group of people who developed the serious disorder after receiving the AstraZeneca or Johnson & Johnson vaccine. Researchers identify genetic mutation in small group of people who developed the serious disorder after receiving the AstraZeneca or Johnson & Johnson vaccine.

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Originally published on Nature on 2/13/2026