Not Yet RecruitingNot Applicable

the Five-year Antibody Persistence After Immunization With IPV, MMR and HepA-L Vaccines

China600 participantsStarted 2026-01-30

Plain-language summary

This study evaluated the antibody persistence of Chinese children five years after they received four doses of sIPV, two doses of MMR vaccine and one dose of HepA-L vaccine.

Who can participate

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Participants in the NCT04638985 or NCT04636827, and who have completed the vaccination of designated batch numbers of sIPV, MMR or HepA-L vaccines; * The time window from the day of enrollment to the date when the participants received the fourth dose of sIPV vaccine, the second dose of MMR vaccine, or the first dose of HepA-L vaccine was 60 to 66 months. * The informed consent form shall be signed by the participant or his/her legal guardian and dated. Exclusion Criteria: * None.

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

seropositive rates of antibodies against poliovirus

Timeframe: 5 years after the four doses of sIPV immunization

seropositive rates of antibodies against measles, rubella, mumps

Timeframe: 5 years after the two doses of MMR immunization

seropositive rates of antibodies against hepatitis A

Timeframe: 5 years after the one doses of HepA-L immunization

Trial details

NCT IDNCT07338851

SponsorChina National Biotec Group Company Limited

Sponsor typeINDUSTRY

Study typeOBSERVATIONAL

Primary completion2026-12-31

Contact for this trial

Weijun Hu

029-82221350 huweijun0828@163.com

View on ClinicalTrials.gov More Polio trials