Long COVID-19: a Four-Year prospective cohort study of risk factors, recovery, and quality of life.

BMC Infect Dis · 2025 · PMC12398010 · PMID 40883696

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did not reach statistical significanceno p-value reported

However, it did not reach statistical significance, possibly due to variability in timing, vaccine type, or waning immunity, as suggested in prior studies [ 14 , 15 ].

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