Worst effect on region linked to smell, while infected people typically scored lower on mental skills test
The first major study to compare brain scans of people before and after they catch Covid has revealed shrinkage and tissue damage in regions linked to smell and mental capacities months after subjects tested positive.
Disrupted signal processing in such areas may contribute to symptoms such as smell loss. Those who were infected also typically scored lower on a mental skills test than uninfected individuals. Lower scores were associated with a greater loss of brain tissue in the parts of the cerebellum involved in mental ability.
The study identified 16 new genetic variants associated with admission to intensive care, including genes implicated in blood clotting, the immune system and the intensity of inflammation.
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