Biomarkers of post-acute infection syndrome: a systematic literature review https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2026.1741761/full "Overall, the total risk of bias was frequently classified as high, whereas only a limited number of studies demonstrated a low or moderate overall risk of bias” #LongCovid #mecfs #cfs @mecfs@fedigroups.social @longcovid@fedigroups.social