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New combo shot study: pneumonia vaccine plus flu jab shows promise in older adults

NCT ID NCT05526716

Prevention Sponsor: Merck Sharp & Dohme LLC Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tested a new pneumococcal vaccine (V116) given at the same time as the seasonal flu shot in 1,080 adults aged 50 and older. The goal was to see if giving both vaccines together is safe and produces a strong immune response. Results help determine whether combining these shots is a good option for preventing pneumonia and flu.

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 3

Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.

Participants

1,080 people

The number who actually took part.

Started

Sep 2022

Finished

Jun 2023

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Ages

50 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Any underlying chronic conditions were assessed to be in stable condition per the investigator's judgment * Females: Not pregnant or a breast feeding and not a woman of childbearing potential (WOCBP) or a WOCBP agrees to use contraception or remain abstinent Exclusion Criteria: * History of IPD or other culture-positive pneumococcal disease * Known or suspected impairment of immunological function * Receipt of systemic corticosteroids or immunosuppressive therapy * Received any pneumococcal vaccine \<12 months prior to enrollment * Prior administration of PCV15 or PCV20 * Received any influenza vaccine \<6 months prior to enrollment

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Conditions

The condition(s) this trial relates to.

streptococcal pneumonia pneumococcal infection prevention target

As listed by the trial registrant

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

Pneumonia, pneumococcal

Contacts and locations

Locations

  • Alivation Research-Primary Care ( Site 0066)

    Lincoln, Nebraska, 68526, United States

  • Alliance for Multispecialty Research, LLC ( Site 0051)

    South Jordan, Utah, 84095, United States

  • Alpha Science Research ( Site 0042)

    Miami, Florida, 33186, United States

  • Artemis Institute for Clinical Research ( Site 0023)

    San Diego, California, 92103, United States

  • Arthritis Northwest, PLLC ( Site 0059)

    Spokane, Washington, 99204, United States

  • Axces Research ( Site 0037)

    Santa Fe, New Mexico, 87505, United States

  • Benchmark Research ( Site 0025)

    Fort Worth, Texas, 76135, United States

  • CTI Clinical Research Center ( Site 0071)

    Cincinnati, Ohio, 45212, United States

  • California Research Foundation ( Site 0005)

    San Diego, California, 92123, United States

  • Carbon Health - North Hollywood - NoHo West ( Site 0016)

    North Hollywood, California, 91606, United States

  • Carolina Institute for Clinical Research ( Site 0047)

    Fayetteville, North Carolina, 28303, United States

  • Catalina Research Institute, LLC ( Site 0067)

    Montclair, California, 91763, United States

  • Centennial Medical Group ( Site 0035)

    Elkridge, Maryland, 21075, United States

  • Central Phoenix Medical Clinic-Synexus Clinical Research US ( Site 0012)

    Phoenix, Arizona, 85020, United States

  • Clinical Research Associates Inc ( Site 0026)

    Nashville, Tennessee, 37203, United States

  • Clinical Research Atlanta ( Site 0068)

    Stockbridge, Georgia, 30281, United States

  • Diablo Clinical Research, Inc. ( Site 0020)

    Walnut Creek, California, 94598, United States

  • East Coast Institute for Research - Canton ( Site 0004)

    Canton, Georgia, 30114, United States

  • East Coast Institute for Research, LLC ( Site 0013)

    Jacksonville, Florida, 32216, United States

  • Hatboro Medical Associates / CCT Research ( Site 0065)

    Hatboro, Pennsylvania, 19040, United States

  • Headlands Research - Brownsville ( Site 0069)

    Brownsville, Texas, 78526, United States

  • Health Awareness ( Site 0034)

    Jupiter, Florida, 33458, United States

  • Healthcare Research Network - Chicago ( Site 0014)

    Flossmoor, Illinois, 60422, United States

  • Healthcare Research Network - St. Louis ( Site 0011)

    St Louis, Missouri, 63042, United States

  • Holston Medical Group-Clinical Research ( Site 0009)

    Kingsport, Tennessee, 37660, United States

  • Holston Medical Group-Clinical Research ( Site 0028)

    Bristol, Tennessee, 37620, United States

  • Hope Clinical Research, Inc. ( Site 0070)

    Canoga Park, California, 91303, United States

  • Indago Research & Health Center, Inc ( Site 0029)

    Hialeah, Florida, 33012, United States

  • Innovative Medical Research of Texas ( Site 0079)

    Houston, Texas, 77065, United States

  • Lakes Research ( Site 0063)

    Miami Lakes, Florida, 33014, United States

  • LinQ Research ( Site 0074)

    Pearland, Texas, 77584, United States

  • M3 Wake Research Associates ( Site 0040)

    Raleigh, North Carolina, 27612, United States

  • Meridian Clinical Research, LLC ( Site 0032)

    Vestal, New York, 13850, United States

  • New Horizon Medical Group ( Site 0078)

    Houston, Texas, 77042, United States

  • Optimal Research ( Site 0008)

    Melbourne, Florida, 32934, United States

  • Optimal Research ( Site 0015)

    Austin, Texas, 78705, United States

  • Paradigm Clinical Research Centers, Inc ( Site 0024)

    La Mesa, California, 91942, United States

  • Radiant Research ( Site 0073)

    St Louis, Missouri, 63141, United States

  • Rochester Clinical Research, Inc. ( Site 0055)

    Rochester, New York, 14609, United States

  • Smith Allergy and Asthma Specialists-Certified Research Associates ( Site 0019)

    Cortland, New York, 13045, United States

  • Suncoast Research Associates ( Site 0041)

    Miami, Florida, 33173, United States

  • Suncoast Research Group-Clinical Department ( Site 0062)

    Miami, Florida, 33135, United States

  • Synexus Clinical Research US, Inc - New York ( Site 0053)

    New York, New York, 10017, United States

  • Synexus Clinical Research US, Inc. ( Site 0001)

    Murray, Utah, 84123, United States

  • Synexus Clinical Research US, Inc. ( Site 0072)

    Chicago, Illinois, 60602, United States

  • Triple O Research Institute, P.A ( Site 0054)

    West Palm Beach, Florida, 33407, United States

  • Valley Clinical Trials, Inc. ( Site 0002)

    Northridge, California, 91325, United States

  • Velocity Clinical Research, Anderson ( Site 0077)

    Anderson, South Carolina, 29621, United States

  • Velocity Clinical Research, Columbia ( Site 0058)

    Columbia, South Carolina, 29204, United States

  • Velocity Clinical Research, Hallandale Beach ( Site 0064)

    Hallandale, Florida, 33009, United States

  • Velocity Clinical Research, Medford ( Site 0060)

    Medford, Oregon, 97504, United States

  • Velocity Clinical Research, Providence ( Site 0021)

    East Greenwich, Rhode Island, 02818, United States

  • Velocity Clinical Research, Spokane ( Site 0050)

    Spokane, Washington, 99204, United States

  • WR- PRI, LLC ( Site 0044)

    Newport Beach, California, 92620, United States

  • WR-CRCN, LLC ( Site 0018)

    Las Vegas, Nevada, 89106, United States

  • WR-MCCR, LLC ( Site 0033)

    San Diego, California, 92120, United States

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