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Index/Topics/Vaccine Antigen Persistence

Vaccine Antigen Persistence

The persistence of vaccine antigen in the body after vaccination, including the duration of spike protein detection and its implications for immune persistence and pathology.

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2 results
Jan 11, 2026

Do differences in vaccine type or dose affect how long spike protein is detectable?

Different vaccine platforms and dosing regimens do influence whether and for how long fragments of spike protein or spike subunits are detectable in blood, but the picture is inconsistent because dete...

Jan 8, 2026

Does the spike protein produced after vaccination get cleared by the immune system?

Vaccination-induced spike protein is generally transient and is cleared by the immune system in most people within days-to-weeks, but multiple small studies and case series report detectable spike ant...

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