MRNA vaccines provide protection for only a short period of time.
the verdict
SUPPORTED
the evidence backs this
confidence 78/100
Multiple studies demonstrate that humoral immunity and neutralizing antibody levels following mRNA vaccination experience a notable decline over several months, supporting the claim that protection is short-term without booster doses.
Evidence for · 3
Temporal dynamics of SARS-CoV-2 antibodies and IgG subclasses following multiple doses and diverse COVID-19 vaccine combinations.
2025 · cited by 2
Antibody levels noticeably decline across participants six months post-vaccination.
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More for · 2
NVX-CoV2372, monovalent mRNA and bivalent mRNA vaccines elicit broadly cross-reactive antibodies against emerging SARS-CoV-2 variants.
2026 · cited by 0
Neutralization levels against variants wane significantly by 12 months post-vaccination.
Dynamics and Protective Effectiveness of Serological Testing Among Healthcare Workers Vaccinated Against COVID-19.
2026 · cited by 0
Antibody titers peak after primary vaccination but decline sharply by quarters 2 and 3.