Persistent symptoms and clinical findings in adults with post-acute sequelae of COVID-19/post-COVID-19 syndrome in the second year after acute infection: A population-based, nested case-control study.

From Supplementary table S2, two or more vaccine shots appears correlated with a lower odds ratio for cases improved, and a higher odds ratio for controls worsening (although the effect may not be significant).

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Similarly, the differences in the proportion of participants with VO 2max below defined thresholds for males and females were substantial and highly significant between persistent case patients and participants with continued recovery S4 Table ).

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