'In one analysis that combined data from 11 of those studies, researchers found a particular region of the genome that was associated with about 1.6-fold higher odds of developing long COVID. That segment of DNA is near a gene called FOXP4, which is active in the lungs and other organs. The variant linked to long COVID is also associated with higher expression of FOXP4 in lung cells.'
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https://www.nature.com/articles/s42003-021-02549-5