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Why protective antibodies fade after COVID-19 vaccines?, Exhibited faster…
Why protective antibodies fade after COVID-19 vaccines?
Immunity Patterns Over Time
Antibody levels drop after vaccination but eventually stabilizes
Two phases of antibody response
Phase 2: Stabilization with very slow decrease over time.
Phase 1: Rapid initial decay after vaccination
Impact of Pre-existing Immunity
People with prior infection to COVID-19
exhibited faster response to vaccination.
Individuals who were NOT infected by COVID-19 prior to their vaccination
Displayed lower antibody response, while antibody levels stayed higher for those who had been infected
Role of Booster Shots
Temporarily increase antibody levels for everyone, regardless of prior infection.
With each booster, peak antibody levels become lower over time.
Effects of Breakthrough Infections
Infection raises antibodies to levels comparable to an extra vaccine dose.
Helps maintain immunity similar to those who received boosters.
Study & Research Findings
Data from over 8,000 samples over the course of 3 years in New York City.
Confirms long-lasting antibody responses despite initial decline.
Factors Influencing Antibody Waning
Pre-existing Immunity
Faster, stronger response post-vaccine.
Side effects more pronounced
Booster Doses
Increase antibody titers but diminish with successive exposures.
Breakthrough Infections
Act as a natural booster, increasing antibody titers.
Vaccine Type
Moderna induces slightly higher antibody responses than Pfizer.
Exhibited faster response to vaccination.