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Can a shingles shot protect transplant patients? timing may be key.

NCT ID NCT05775718

Vaccine Sponsor: University of Colorado, Denver Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at how well the shingles vaccine Shingrix works in people who have had a stem cell transplant. About 55 adults who received the vaccine at least a year after their transplant will have their immune responses measured. Researchers want to see if the timing of the vaccine after transplant affects protection and whether a third dose might help.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 55 people

The number the study aims to enrol. It can still change while the study runs.

Started

Oct 2023

Expected to finish

Dec 2030

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 79 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Allo-SCT recipients being age 18 - 79 years at time of allo-SCT. * Written informed consent being obtained from the subject * Two doses of RZV, separated by 2 to 6 months, administered at least 1 year after allo-SCT. * Enrollment at \>/= 18 months after second dose of Shingrix. * Female subjects of childbearing potential (FOCBP) enrolled in the study only if they: * have practiced adequate contraception for 30 days prior to vaccination with any dose of zoster vaccine and * have a negative pregnancy test on the day of each dose of zoster vaccine and * agree to continue adequate contraception during the vaccination period and for 2 months after receipt of the vaccine. * Investigator belief that the participant will comply with the requirements of the protocol Exclusion Criteria: * Active Graft Versus Host Disease (aGVHD) at the time of enrollment and receipt of the third dose of RZV * Having received ≥20 mg prednisone for more than 2 weeks (or equivalent) in the 8 weeks preceding enrollment. * Receiving any significant immunosuppressive therapy other than for graft maintenance, in the opinion of the investigator. * Having received a live attenuated vaccine within the last 4 weeks, or inactivated vaccine in the last 2 weeks, prior to enrollment. * Having a history of HZ after the administration of the primary 2-dose RZV immunization regimen. * Pregnancy or breastfeeding * Receiving investigational drugs from 30 day before enrollment or planned during the study * Inability of participants unable to comply with the study schedule in the opinion of the investigator

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Conditions

The condition(s) this trial relates to.

herpes zoster prevention target

As listed by the trial registrant

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

Bone marrow transplant Stem cell transplant

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • University of Colorado Hospital

    RECRUITING

    Aurora, Colorado, 80045, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.