Follow-up study on lasting protection from a combined vaccine
Part of Infections, Lungs & breathing clinical trials.
This study is checking how long the protection from an earlier vaccine (which combined protection against whooping cough, diphtheria, and tetanus) lasts. If you took part in that earlier trial, this follow-up will help see if you still have protection.
Summary written for real people, not researchers, by Clin2.
Who can take part
- You took part in the earlier CanSino trial of the combined 5-component DTP-polio vaccine (for those aged 6 and older).
- You are willing to provide identification documents.
- You (or your guardian) can sign the informed consent form.
- You are able to follow the study schedule and complete the full follow-up.
- You have not received another DTP-type vaccine after finishing that earlier trial.
- You have not had a DTP-related illness since then, and you do not have a bleeding disorder.
Quick eligibility check
Answer a few plain-language questions, based on this study's own requirements, to get a preliminary sense of fit.
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