ClinicalTrials.gg
CompletedNCT03268083Updated Oct 26, 2021

A Study to Evaluate the Immunogenicity and Safety of EV71 Vaccine in Pediatric Subjects

A Phase 2 interventional study of EV71 vaccine ([0.5 μg total protein + adjuvant 150 μg AI(OH)3] per dose) and EV71 vaccine ([1 μg total protein + adjuvant 150 μg AI(OH)3] per dose) in Enterovirus Infections, sponsored by Enimmune Corporation. Completed at 4 sites in Taiwan. Open to participants aged 2 Months to 6 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-10-26.

Sponsored by Enimmune Corporation · Phase 2, Interventional, and Prevention

Phase
Phase 2
Study type
Interventional
Enrollment
140
Allocation
Randomized
Ages
2 Months to 6 Years
Sex
All
01

Study summary

The objectives of this study are to evaluate the immune response and safety profiles of two injections of EV71 vaccine administrated with or without adjuvant Al(OH)3 at 0.5-μg and 1-μg dose in children aged 3 to 6 years old and 2 to 35 months old infants/toddlers.

02

Conditions studied

  • Enterovirus Infections

Keywords

  • Foot-and-Mouth Disease
  • Vaccines
  • Hand, Foot and Mouth Disease
  • EV71 vaccine
03

In context

Enterovirus Infections

48 studies on the registry are indexed under Enterovirus Infections; 3 are open to participants now.

This study's enrollment of 140 is close to the median of 132 across 31 interventional studies indexed under Enterovirus Infections.

Browse Enterovirus Infections studies →

Lead sponsor

Enimmune Corporation is the lead sponsor of 5 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
2 Months to 6 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Healthy children aged from 3 to 6 years old (i.e. ≥ 3 years old and \< 7 years old) for Part A,and from 2 to 35 months old (i.e. ≥ 2 months old and \< 36 months old) for Part B at the time of first vaccination.
  2. Subject's guardians are able and willing to comply with study procedures and provide the signed .
  3. Subject is able and can comply with the requirements of the protocol.
  4. Subject with body temperature ≤38°C.

Exclusion criteria

Exclusion Criteria:

  1. Subject with previous known exposure to Enterovirus 71 (EV71).
  2. Subject with a history of herpangina, hand-foot-mouth disease,and acute hemorrhagic conjunctivitis associated with enterovirus infection in the past 3 months.
  3. Subject with gestation \< 37 weeks.
  4. Subject with birth weight \<2.5 kg.
  5. Subject with a history of to vaccines, or a history of allergic disease or reactions likely to be exacerbated by any component of the vaccine.
  6. Family history of seizures or progressive neurological disease.
  7. Family history of congenital or hereditary immunodeficiency.
  8. Severe malnutrition or dysgenopathy.
  9. Major congenital defects or serious chronic illness, including perinatal brain damage.
  10. Subject diagnosed of having disease (e.g., celiac disease, type I diabetes, lupus (SLE), juvenile dermatomyositis, scleroderma, juvenile idiopathic arthritis (JIA), immune (or idiopathic) thrombocytopenia purpura).
  11. Bleeding disorder diagnosed by a doctor or significant bruising or hemostatic difficulties with IM injections or blood draws.
  12. Any acute infections 7 days prior to administrating the first vaccination.
  13. Use of any product (including drug, vaccine) within 30 days prior to vaccination or planned use during the study period.
  14. Administration of any vaccines within 14 days prior to randomization.
  15. Use of immunoglobulins or any blood products within 3 months prior to vaccination or planned use during the study period.
  16. Chronic administration (defined as > 14 days) of or other immunomodulators or systemic within 6 months prior to vaccination or planned use during the study period.
  17. Subjects who had ever received investigational EV-71 vaccine prior to randomization.
  18. Under anti-tuberculosis prevention or therapy.
  19. Any condition that in the opinion of the investigator may interfere with the evaluation of study objectives.
Terms in these criteria, in plain language(6)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

05

Study design

Phase
Phase 2
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
140 participants (actual)

Study arms

  • Experimental
    Group A1

    3 to 6 years

    Biological: EV71 vaccine ([0.5 μg total protein + adjuvant 150 μg AI(OH)3] per dose)

  • Experimental
    Group A2

    3 to 6 years

    Biological: EV71 vaccine ([1 μg total protein + adjuvant 150 μg AI(OH)3] per dose)

  • Experimental
    Group A3

    3 to 6 years

    Biological: EV71 vaccine ([1 μg total protein ] per dose)

  • Experimental
    Group B1

    2 to 35 months

    Biological: EV71 vaccine ([0.5 μg total protein + adjuvant 150 μg AI(OH)3] per dose)

  • Experimental
    Group B2

    2 to 35 months

    Biological: EV71 vaccine ([1 μg total protein + adjuvant 150 μg AI(OH)3] per dose)

  • Experimental
    Group B3

    2 to 35 months

    Biological: EV71 vaccine ([1 μg total protein ] per dose)

Interventions

  • BiologicalEV71 vaccine ([0.5 μg total protein + adjuvant 150 μg AI(OH)3] per dose)

    Drug page: EV71

    Two vaccinations at 28 days apart

  • BiologicalEV71 vaccine ([1 μg total protein + adjuvant 150 μg AI(OH)3] per dose)

    Drug page: EV71

    Two vaccinations at 28 days apart

  • Two vaccinations at 28 days apart

06

What researchers measure

Primary outcomes

  1. Serum neutralizing antibody titers (NT) induced by the EV71 vaccine

    Evaluate the immunogenicity change of serum neutralizing antibody titers induced by the EV71 vaccine from baseline on Day 56

    Time frame: Day 56

  2. Seroconversion rate (SCR) based on neutralizing antibody titers

    Evaluate the immunogenicity change of SCR from baseline on Day 56

    Time frame: Day 56

  3. Serum neutralizing antibody titers (NT) induced by the EV71 vaccine

    Evaluate the immunogenicity change of serum neutralizing antibody titers induced by the EV71 vaccine from baseline on Day 28

    Time frame: Day 28

  4. Serum neutralizing antibody titers (NT) induced by the EV71 vaccine

    Evaluate the immunogenicity change of serum neutralizing antibody titers induced by the EV71 vaccine from baseline on Day 196

    Time frame: Day 196

  5. Seroconversion rate (SCR) based on neutralizing antibody titers

    Evaluate the immunogenicity change of SCR from baseline on Day 28

    Time frame: Day 28

  6. Seroconversion rate (SCR) based on neutralizing antibody titers

    Evaluate the immunogenicity change of SCR from baseline on Day 196

    Time frame: Day 196

Secondary outcomes

  1. Solicited adverse events

    Time frame: 7 days after each vaccination

  2. Unsolicited adverse events

    Time frame: 28 days after each vaccination

  3. The occurrence of overall adverse events (AEs) and serious adverse event (SAEs)

    Time frame: Day 0 to Day 196

  4. The occurrence of EV 71 breakthrough infection after Visit 3

    Time frame: Day 57 to Day 364

  5. Serum neutralizing antibody titers (NT) induced by the EV71 vaccine

    Evaluate the immunogenicity of serum neutralization antibody titer induced by the EV 71 vaccine on Day 364

    Time frame: Day 364

07

Study locations

4 sites
  • China Medical University Hospital
    Taichung, Taiwan
  • National Taiwan University Hospital
    Taipei, Taiwan
  • Taipei Veterans General Hospital
    Taipei, Taiwan
  • Linkou Chang Gung Memorial Hospital
    Taoyuan, Taiwan
08

References and documents

Publications

  • Hung MC, Cho CY, Chen CJ, Lai CC, Wu KG. Immunogenicity and safety of an inactivated enterovirus A71 vaccine in children 3-6 years and 2-35 months of age- an open-label, randomized phase IIb clinical trial. Vaccine. 2019 Sep 3;37(37):5559-5566. doi: 10.1016/j.vaccine.2019.07.096. Epub 2019 Aug 6. PubMed 31399275 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Jul 2016 to primary completion in Aug 2017, 13 months.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 4, 2016
First posted
Aug 31, 2017
StartActual
Jul 2016
Primary completionActual
Aug 2017
CompletionActual
Dec 2017
Last update
Oct 26, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Oct 26, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03268083
Lead sponsor
Enimmune Corporation
Responsible party
Sponsor
First posted
Aug 31, 2017
Start date
Jul 2016
Primary completion
Aug 2017
Completion
Dec 2017
Last update
Oct 26, 2021

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Oct 2021. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drug tested here: EV71

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