Will a single DTP vaccine dose protect for a decade? study tracks antibodies

NCT ID NCT07744347

Not yet recruiting Knowledge-focused Sponsor: CanSino Biologics Inc. Source: ClinicalTrials.gov ↗

First seen Aug 04, 2026 · Last updated Aug 05, 2026 · Updated 1 time

Summary

This study follows 160 people who previously received a 5-component DTP vaccine (protecting against diphtheria, tetanus, and pertussis) to see how long their immune protection lasts. Blood samples are taken at 2.5, 5, and 10 years after vaccination to measure antibody levels. The goal is to understand the duration of vaccine-induced immunity, which could inform future booster recommendations.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: Blood sample collection to measure immune response after prior vaccination with a 5-component acellular pertussis, diphtheria, and tetanus (DTP) vaccine
What this could lead to: If successful, this could help determine how long protection from the DTP vaccine lasts, guiding future booster shot schedules.
What could go wrong: This is an observational follow-up study, not a test of a new treatment. Results depend on participants returning for blood draws over 10 years, and antibody levels may not directly predict real-world protection.

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Conditions

The condition(s) this trial relates to.

diphtheria pertussis tetanus

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

DIPHTHERIA PERTUSSIS TETANUS

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