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Herpes ZosterPhase 3NCT01767467

Study to Assess the Safety and Immunogenicity of GlaxoSmithKline (GSK) Biologicals' Herpes Zoster Subunit (HZ/su) Vaccine in Adults Aged 18 Years and Older With Blood Cancers

A Phase 3 study testing Herpes zoster vaccine (GSK 1437173A) in people with Herpes Zoster, run by GlaxoSmithKline at 86 sites in 21 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

The purpose of this study is to evaluate the safety and immunogenicity of GSK Biologicals' vaccine GSK1437173A in subjects aged 18 years and older with blood cancers. The study will evaluate safety-related events and antibody and cellular immune responses to the study vaccine, as compared to placebo. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Herpes Zoster
What is being tested?
Herpes zoster vaccine (GSK 1437173A)
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
568 participants
Where
86 sitesin 21 countries
Study dates
1 Mar 2013to 6 Jan 2017
Phase
Phase 3
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Subjects who the investigator believes can and will comply with the requirements of the protocol.
  • Written informed consent obtained from the subject.
  • A male or female, aged 18 years or older at the time of study entry.
  • Subject who has been diagnosed with one or more haematologic malignancies prior to the first vaccination and who is receiving, is scheduled to receive or has just finished immunosuppressive cancer therapy to treat this condition.
  • Life expectancy greater than or equal to 12 months, as assessed by the investigator.
  • Female subjects of non-childbearing potential may be enrolled in the study.
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  • Non-childbearing potential is defined as pre-menarche, current tubal ligation, hysterectomy, ovariectomy or post-menopause.
  • Female subjects of childbearing potential may be enrolled inthe study, if the subject:
  • has practiced adequate contraception for 30 days prior to vaccination, and
  • has a negative pregnancy test on the day of vaccination, and
  • has agreed to continue adequate contraception during the entire treatment period and for 2 months after completion of the vaccination series.

Who cannot join

  • Subject diagnosed with chronic lymphocytic leukaemia (CLL) who is receiving only oral cancer therapy (subject receiving intra-venous cancer therapy for CLL or intra-venous cancer therapy in combination with oral therapy may be enrolled).
  • Subject receiving radiotherapy alone as treatment for his/her haematologic malignancy.
  • Planned haematopoietic stem cell transplant (HCT) during the study period. (If a HCT occurred prior to enrolment in the study, the subject may not receive study vaccine until at least 50 days after the transplant procedure).
  • Human immunodeficiency virus (HIV) infection by clinical history.
  • Use of any investigational or non-registered product other than the study vaccine within 30 days preceding the first dose of study vaccine/placebo, or planned use during the study period. However, the investigational use of a registered product to treat the subject's underlying disease, is allowed.
  • Previous vaccination against HZ or varicella within the 12 months preceding the first dose of study vaccine/placebo.
Show all 13Show fewer
  • Planned administration during the study of a HZ or varicella vaccine (including an investigational or non-registered vaccine) other than the study vaccine.
  • Occurrence of a varicella or HZ episode by clinical history within the 12 months preceding the first dose of study vaccine/placebo.
  • History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccine.
  • Administration or planned administration of a live vaccine in the period starting 30 days before the first dose of study vaccine and ending 30 days after the last dose of study vaccine.
  • Administration or planned administration of a non-replicating vaccine within 8 days prior to or within 14 days after either dose of study vaccine.
  • Pregnant or lactating female.
  • Female planning to become pregnant or planning to discontinue contraceptive precautions before Month 3 (i.e., 2 months after the last dose of study vaccine/placebo).

Trial locations and contacts

86 sites in 21 countries.

86 sites in 21 countries

Spain10 sites
  • GSK Investigational Site

    Barcelona, 08035

  • GSK Investigational Site

    Madrid, 28009

  • GSK Investigational Site

    Madrid, 28033

  • GSK Investigational Site

    Madrid, 28040

  • GSK Investigational Site

    Madrid, 28041

  • GSK Investigational Site

    Madrid, 28050

  • GSK Investigational Site

    Majadahonda (Madrid), 28222

  • GSK Investigational Site

    Móstoles, Madrid, 28933

  • GSK Investigational Site

    Pozuelo de Alarcón/Madrid, 28223

  • GSK Investigational Site

    Santander, 39008

Other trials in Spain

South Korea9 sites
  • GSK Investigational Site

    Busan, 614-735

  • GSK Investigational Site

    Daegu, 700-721

  • GSK Investigational Site

    Incheon, 405-760

  • GSK Investigational Site

    Jellanamdo, 519-809

  • GSK Investigational Site

    Jeonju, 561-712

  • GSK Investigational Site

    Kyunggi-do, 410-769

  • GSK Investigational Site

    Seoul, 110-744

  • GSK Investigational Site

    Seoul, 135-710

  • GSK Investigational Site

    Seoul, 137-701

Other trials in South Korea

United States8 sites
  • GSK Investigational Site

    Boston, Massachusetts, 02115

  • GSK Investigational Site

    Chapel Hill, North Carolina, 27514

  • GSK Investigational Site

    Chicago, Illinois, 60637

  • GSK Investigational Site

    Elkhart, Indiana, 46514

  • GSK Investigational Site

    Inverness, Florida, 34452

  • GSK Investigational Site

    Marshfield, Wisconsin, 54449

  • GSK Investigational Site

    Minneapolis, Minnesota, 55455

  • GSK Investigational Site

    Seattle, Washington, 98108

Other trials in United States

Belgium7 sites
  • GSK Investigational Site

    Antwerp, 2060

  • GSK Investigational Site

    Bruges, 8000

  • GSK Investigational Site

    Brussels, 1000

  • GSK Investigational Site

    Brussels, 1200

  • GSK Investigational Site

    Hasselt, 3500

  • GSK Investigational Site

    Jette, 1090

  • GSK Investigational Site

    Leuven, 3000

Other trials in Belgium

France6 sites
  • GSK Investigational Site

    Montpellier, 34295

  • GSK Investigational Site

    Mulhouse, 68070

  • GSK Investigational Site

    Nantes, 44093

  • GSK Investigational Site

    Périgueux, 24019

  • GSK Investigational Site

    Pessac, 33604

  • GSK Investigational Site

    Rouen, 76038

Other trials in France

Russia6 sites
  • GSK Investigational Site

    Nizhny Novgorod, 603126

  • GSK Investigational Site

    Petrozavodsk, 185019

  • GSK Investigational Site

    Saint Petersburg, 197 089

  • GSK Investigational Site

    Saint Petersburg, 197758

  • GSK Investigational Site

    St'Petersburg, 191024

  • GSK Investigational Site

    Yekaterinburg, 620102

Other trials in Russia

United Kingdom6 sites
  • GSK Investigational Site

    Airdrie, Lanarkshire, ML6 0JS

  • GSK Investigational Site

    Bournemouth, BH7 7DW

  • GSK Investigational Site

    Headington, Oxford, OX3 7LE

  • GSK Investigational Site

    London, SE13 6LH

  • GSK Investigational Site

    Orpington, Kent, BR6 8ND

  • GSK Investigational Site

    Swindon, Wiltshire, SN3 6BB

Other trials in United Kingdom

Australia4 sites
  • GSK Investigational Site

    Coburg, Victoria, 3058

  • GSK Investigational Site

    Darlinghurst, New South Wales, 2010

  • GSK Investigational Site

    Hobart, Tasmania, 7000

  • GSK Investigational Site

    Wodonga, Victoria, 3690

Other trials in Australia

Canada4 sites
  • GSK Investigational Site

    Halifax, Nova Scotia, B3K 6R8

  • GSK Investigational Site

    Oshawa, Ontario, L1G 2B9

  • GSK Investigational Site

    Saint John, New Brunswick, E2L 4L2

  • GSK Investigational Site

    Toronto, Ontario, M4C 3E7

Other trials in Canada

Sweden4 sites
  • GSK Investigational Site

    Eskilstuna, SE-631 88

  • GSK Investigational Site

    Karlskrona, SE-371 41

  • GSK Investigational Site

    Malmö, SE-205 02

  • GSK Investigational Site

    Uppsala, SE-751 85

Other trials in Sweden

Taiwan4 sites
  • GSK Investigational Site

    Kaohsiung City, 833

  • GSK Investigational Site

    Taichung, 404

  • GSK Investigational Site

    Taipei, 112

  • GSK Investigational Site

    Taoyuan Hsien, 333

Other trials in Taiwan

Italy3 sites
  • GSK Investigational Site

    Meldola (FC), Emilia-Romagna, 47014

  • GSK Investigational Site

    Novara, Piedmont, 28100

  • GSK Investigational Site

    Udine, Friuli Venezia Giulia, 33100

Other trials in Italy

Poland3 sites
  • GSK Investigational Site

    Chorzów, 41-500

  • GSK Investigational Site

    Opole, 45-372

  • GSK Investigational Site

    Słupsk, 76-200

Other trials in Poland

Finland2 sites
  • GSK Investigational Site

    Helsinki, 00029

  • GSK Investigational Site

    Tampere, 33520

Other trials in Finland

New Zealand2 sites
  • GSK Investigational Site

    Christchurch, 8011

  • GSK Investigational Site

    Hamilton, 3240

Other trials in New Zealand

Pakistan2 sites
  • GSK Investigational Site

    Lahore

  • GSK Investigational Site

    Multan

Other trials in Pakistan

Turkey (Türkiye)2 sites
  • GSK Investigational Site

    Ankara, 06500

  • GSK Investigational Site

    Ankara, 06590

Other trials in Turkey (Türkiye)

Czechia1 site
  • GSK Investigational Site

    Prague, 128 08

Other trials in Czechia

Hong Kong1 site
  • GSK Investigational Site

    Hong Kong

Other trials in Hong Kong

Panama1 site
  • GSK Investigational Site

    Panama City

Other trials in Panama

Singapore1 site
  • GSK Investigational Site

    Singapore, 169608

Other trials in Singapore

About this study

Official title: Study to Evaluate Safety and Immunogenicity of GSK Biologicals' Herpes Zoster Vaccine GSK1437173A in Adults Aged 18 Years and Older With Haematologic Malignancies

The purpose of this study is to evaluate the safety and immunogenicity of GSK Biologicals' vaccine GSK1437173A in subjects aged 18 years and older with blood cancers. The study will evaluate safety-related events and antibody and cellular immune responses to the study vaccine, as compared to placebo.

Read the detailed description

Amendment to protocol posting:

Increase in sample size, update of country/region-specific information (Sections 5, 6 and 9).

Promotion of secondary to primary objective; related update of primary and secondary outcome measures (Sections 4 and 7).

Conditions
Herpes Zoster
Being tested
Herpes zoster vaccine (GSK 1437173A), Placebo
Keywords
Immunogenicity, Safety, Herpes zoster, Vaccination, Haematologic malignancies
Medical subject headings
Herpes Zoster

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Herpes zoster vaccine (GSK 1437173A)Biological

    2 doses administered intramuscularly (IM) in deltoid region of non-dominant arm. Dose 1 administered at Day 0. Dose 2 administered 1-2 months post Dose 1.

  • PlaceboDrug

    2 doses administered intramuscularly (IM) in deltoid region of non-dominant arm. Dose 1 administered at Day 0. Dose 2 administered 1-2 months post Dose 1.

Study groups in NCT01767467
Study groupRoleWhat they receive
Vaccine GroupExperimentalSubjects will receive the candidate HZ vaccine (GSK 1437173A).
Receives: Biological: Herpes zoster vaccine (GSK 1437173A)
Placebo GroupPlacebo comparatorSubjects will receive the placebo vaccine.
Receives: Drug: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Vaccine Response Rates (VRR) for Anti-glycoprotein E (Anti-gE) Antibody Concentrations

    Vaccine response rate refers to the percentage of subjects with a vaccine response, as determined by Enzyme-Linked Immunosorbent Assay (ELISA). Vaccine response was defined as: For initially seronegative subjects, antibody concentration at Month 2 greater than or equal to (≥) 4 fold the cut-off for Anti-gE [4x97 milli-international units per milliliter (mIU/mL)]. For initially seropositive subjects, antibody concentration at Month 2 ≥ 4 fold the pre-vaccination antibody concentration.

    This analysis was performed on subjects with haematologic malignancies excluding subjects with Non-Hodgkin B-cell Lymphoma and Chronic Lymphocytic Leukaemia.

    Measured: At Month 2

  2. Adjusted Geometric Mean Concentration of Anti-gE Antibodies

    The Adjusted geometric mean concentration was measured in all subjects excluding those with Non-Hodgkin B-cell Lymphoma and Chronic Lymphocytic Leukaemia.

    Measured: At Month 2

  3. Number of Subjects With Any and Grade 3 Solicited Local Symptoms

    Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 redness/swelling = redness/swelling spreading beyond 100 millimeters (mm) of injection site.

    Measured: During the 7-day (Days 0-6) post-vaccination period following each dose and across doses

  4. Number of Days With Solicited Local Symptoms

    Solicited local symptoms: pain, redness, swelling and their number of days were recorded after each vaccination dose.

    Measured: Within the 7-day (Days 0-6) post-vaccination period

  5. Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms

    Assessed solicited general symptoms were fatigue, gastrointestinal symptoms (included nausea, vomiting, diarrhoea and/or abdominal pain), headache, myalgia, shivering and fever [defined as oral, axillary or tympanic route measured temperature equal to or above 37.5 degrees Celsius (°C)]. Any = occurrence of the symptom regardless of intensity grade. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination.

    Measured: During the 7-day (Days 0-6) post-vaccination period following each dose and across doses

  6. Number of Days With Solicited General Symptoms

    Solicited general symptoms: fatigue, gastrointestinal symptoms, headache, myalgia, shivering, temperature and their number of days were recorded after each vaccination dose.

    Measured: Withing the 7-day (Day 0-6) post-vaccination period

  7. Number of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs)

    An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study. It also included any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination. Grade 3 AE = an AE which prevented normal, everyday activities. Related = AE assessed by the investigator as related to the vaccination.

    Measured: Within the 30-day (Days 0-29) post-vaccination period

  8. Number of Subjects With Serious Adverse Events (SAEs)

    A Serious adverse event (SAE) is any untoward medical occurrence that result in death, is life threatening, requires hospitalisation or prolongation of existing hospitalisation, results in disability/incapacity, or is a congenital anomaly/birth defect in the offspring of a study subject. Related = SAEs assessed by the investigator as causally related to the study vaccination

    Measured: From first vaccination up to 30 days post last vaccination

  9. Number of Subjects Reporting Any and Related Potential Immune-mediated Diseases (pIMDs)

    Potential immune-mediated diseases (pIMDs) are a subset of AEs that include autoimmune diseases and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune aetiology. Related = pIMds assessed by the investigator as causally related to the study vaccination

    Measured: From first vaccination up to 30 days post last vaccination

Secondary outcomes (11)
  1. Vaccine Response Rate (VRR) for Anti-gE Antibody Concentrations

    Vaccine response rate refers to the percentage of subjects with a vaccine response, as determined by ELISA. Vaccine response was defined as: For initially seronegative subjects, antibody concentration at Month 2 ≥ 4 fold the cut-off for Anti-gE (4x97 mIU/mL). For initially seropositive subjects, antibody concentration at Month 2 ≥ 4 fold the pre -vaccination antibody concentration. This analysis was performed on subjects with haematologic malignancies, excluding subjects with Non-Hodgkin B-cell Lymphoma.

    Measured: At Month 2

  2. Anti-gE Antibody Concentrations

    Antibody concentrations were determined by ELISA, presented as geometric mean concentrations (GMCs) and expressed in milli-international units per milliliter (mIU/mL).This parameter was assessed in subjects with haematologic malignancies, excluding subjects with Non-Hodgkin B-cell Lymphoma.

    Measured: At Month 2

  3. Time to Occurrence of Any Confirmed HZ Case

    Time to occurrence of any confirmed HZ case is expressed in terms of incidence rate of subjects with at least one event. Hence, person-year rate = number of episodes (n)/ sum of follow-up period (censored at the first occurrence of an event) expressed in years (T[year)]). Follow-up period starts Day 1 of vaccination.

    Any clinically suspected case of HZ (defined as (1) a new rash characteristic of HZ (e.g., unilateral, dermatomal and accompanied by pain broadly defined to include allodynia, pruritus or other sensations), or a vesicular rash suggestive of Varicella Zoster Virus (VZV) infection regardless of the distribution, and no alternative diagnosis; or (2) a clinical presentation (symptoms and/or signs) and specific laboratory findings suggestive of VZV infection in the absence of characteristic HZ or VZV rash.) The endpoint is confirmed in two ways: (1) By Polymerase Chain Reaction (PCR) or (2) By the HZ Ascertainment Committee. The PCR is used as primary classification method.

    Measured: From Month 0 until study end (Month 13)

  4. Anti-gE Antibody Concentrations

    Antibody concentrations were determined by ELISA, presented as geometric mean concentrations (GMCs) and expressed in milli-international units per milliliter (mIU/mL). This parameter was assessed in all vaccinated subjects.

    Measured: At Months 0, 1, 2 and 13

  5. Vaccine Response Rate (VRR) for Anti-gE Antibody Concentrations

    Vaccine response rate refers to the percentage of subjects with a vaccine response, as determined by ELISA. Vaccine response was defined as: For initially seronegative subjects, antibody concentration at Month 2 ≥ 4 fold the cut-off for anti-gE (4x97 mIU/mL). For initially seropositive subjects, antibody concentration at Month 2 ≥ 4 fold the pre -vaccination antibody concentration. Vaccine response was measured in all subjects.

    Measured: At Months 1, 2 and 13

  6. Frequency of gE -Specific Cluster of Differentiation 4 (CD4) [2+] T-cells Expressing at Least 2 Activation Markers

    Among markers expressed were interferon-gamma (IFN-γ), interleukin-2 (IL-2), tumour necrosis factor-alpha (TNF-α) and cluster of differentiation 40 ligand (CD40L), as determined by in vitro intracellular cytokine staining (ICS).

    Measured: At Months 0, 1, 2 and 13

  7. Vaccine Response Rates (VRR) for gE-specific CD4 [2+] T-cells, Expressing at Least 2 Activation Markers

    Among markers expressed were IFN-γ, IL-2, TNF-α and CD40L, as determined by in vitro ICS. Vaccine response was defined as:

    For initially subjects with pre-vaccination T-cell frequencies below the threshold, at least a 2-fold increase as compared to the threshold (2x<320> Events/106 CD4+ T cells).

    For initially subjects with pre-vaccination T-cell frequencies above the threshold, at least a 2-fold increase as compared to pre-vaccination T-cell frequencies.

    Measured: At Months 1, 2 and 13

  8. Number of Subjects With Serious Adverse Events (SAEs)

    A Serious adverse event (SAE) is any untoward medical occurrence that result in death, is life threatening, requires hospitalisation or prolongation of existing hospitalisation, results in disability/incapacity, or is a congenital anomaly/birth defect in the offspring of a study subject. Related = SAEs assessed by the investigator as causally related to the study vaccination

    Measured: From first vaccination at Month 0 up to study end at Month 13

  9. Number of Subjects Reporting Any Potential Immune-mediated Diseases (pIMDs)

    Potential immune-mediated diseases (pIMDs) are a subset of AEs that include autoimmune diseases and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune aetiology

    Measured: From first vaccination at Month 0 up to study end at Month 13

  10. Geometric Mean Concentrations (GMCs) of Anti-gE Antibodies

    GMCs of anti-gE antibodies were tabulated per study group and HZ confirmed/non-confirmed status and expressed in milli-international units per milliliter (mIU/mL).

    Measured: At Months 0 and 2

  11. Mean Geometric Increase (MGI) of Anti-gE Antibody ELISA Concentrations

    MGI was tabulated per study group and HZ confirmed/non-confirmed status. MGI was defined as the Geometric mean of the within subject ratios of the post-vaccination reciprocal anti-gE concentration to the Month 0 reciprocal anti-gE concentration.

    Measured: At Month 2

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted14 Jan 2013 (estimated)
  2. Study start1 Mar 2013
  3. Primary completion7 Jan 2016
  4. Study completion6 Jan 2017

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Masking
Triple blind
Who is masked
Participant, Care provider, Outcomes assessor
Enrolment
568 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01767467
Sponsor's protocol ID
116428
Other IDs
2012-003438-18
Status last verified
May 2018
First submitted
10 Jan 2013
Last updated
6 Jun 2018

Publications

  • Zorger AM, Hirsch C, Baumann M, Feldmann M, Brockelmann PJ, Mellinghoff S, Monsef I, Skoetz N, Kreuzberger N. Vaccines for preventing infections in adults with haematological malignancies. Cochrane Database Syst Rev. 2025 May 21;5(5):CD015530. doi: 10.1002/14651858.CD015530.pub2.

    PubMed 40396505
  • Dagnew AF, Ilhan O, Lee WS, Woszczyk D, Kwak JY, Bowcock S, Sohn SK, Rodriguez Macias G, Chiou TJ, Quiel D, Aoun M, Navarro Matilla MB, de la Serna J, Milliken S, Murphy J, McNeil SA, Salaun B, Di Paolo E, Campora L, Lopez-Fauqued M, El Idrissi M, Schuind A, Heineman TC, Van den Steen P, Oostvogels L; Zoster-039 study group. Immunogenicity and safety of the adjuvanted recombinant zoster vaccine in adults with haematological malignancies: a phase 3, randomised, clinical trial and post-hoc efficacy analysis. Lancet Infect Dis. 2019 Sep;19(9):988-1000. doi: 10.1016/S1473-3099(19)30163-X. Epub 2019 Aug 6.

    PubMed 31399377

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing Herpes zoster vaccine (GSK 1437173A) in people with Herpes Zoster, run by GlaxoSmithKline at 86 sites in 21 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 11 inclusion and 13 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 6 Jun 2018. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 86 sites in Spain, South Korea, United States, Belgium, France and 16 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 25 May 2017). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Vaccine Response Rates (VRR) for Anti-glycoprotein E (Anti-gE) Antibody Concentrations (time frame: At Month 2). The study lists 9 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT01767467, which also lists 2 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Jun 2018.

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