Vaccination and Its Effects on Long COVID-19 Prevalence, Severity, and Clinical Outcomes: A Literature Review
Keywords:
Long COVID, SARS-CoV-2, COVID-19 vaccination, symptom severity, clinical outcomesAbstract
Long COVID is a heterogeneous condition characterized by persistent symptoms following SARS-CoV-2 infection and represents an important public health concern. COVID-19 vaccination has been widely implemented, yet its association with long-term post-COVID outcomes remains incompletely understood. This narrative review summarizes current evidence on the relationship between COVID-19 vaccination and Long COVID, focusing on prevalence, symptom severity, and clinical outcomes. Available studies suggest that vaccination may be associated with a lower risk of Long COVID and reduced symptom burden in breakthrough infections, although findings are variable across populations and study designs. Age and pre-existing comorbidities consistently emerge as relevant factors that may influence observed associations. Overall, existing evidence supports a potential protective association of vaccination with Long COVID outcomes, while emphasizing the need for further longitudinal studies with standardized definitions and outcome measures.
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