Open Actively Recruiting

Safety and Efficacy Study of Meningococcal Group B Vaccine rMenB+OMV NZ (Bexsero) to Prevent Gonococcal Infection


Brief Summary

This is a Phase II, randomized, observer-blind, placebo-controlled, multi-site trial of the FDA licensed rMenB+OMV NZ vaccine, Bexsero. The targeted study population is men and women 18-50 years of age who are disproportionately vulnerable to N. gonorrhoeae infection. Approximately 2,200 participants are expected to be enrolled to achieve at least 202 evaluable participants. Data will be collected in an observer-blind manner. Study product recipients and study staff responsible for the evaluation of any study endpoint will be unaware of whether Bexsero or placebo were administered. The duration of the study for participants who are enrolled and randomized will be approximately 16 months. Study participation is expected to be completed in approximately 36 months. The primary objective of the study is to demonstrate efficacy of Bexsero in prevention of urogenital and/or anorectal gonococcal infection.

Primary Purpose
Study Type
Phase 2/Phase 3


Healthy Volunteers
Minimum Age
18 Years
Maximum Age
50 Years

Inclusion Criteria:

  • Participants aged 18 to 50 years of age inclusive on the day of enrollment;
  • If female, participant must be of non-childbearing potential* or has a negative pregnancy test prior to each vaccination**. *Non-childbearing potential is defined as pre-menarche, current bilateral tubal ligation or occlusion, hysterectomy, bilateral ovariectomy or post-menopausal (no menses for at least 12 months); **Note: Although contraceptive methods are not mandated since Bexsero is a marketed product and will be used according to the label, it is anticipated that contraceptive counselling will be provided according to local standard of care.
  • Participant is in good health as determined by past medical history, medication use, and targeted physical examination (including vital signs), in opinion of investigator or their delegate;
  • Has provided signed informed consent;
  • Willing and likely to comply with the trial procedures;
  • Is prepared to grant authorized persons access to the study's medical records.

Exclusion Criteria:

  • Previous receipt of a Meningococcal Group B vaccine;
  • Gonorrhea or chlamydia infection identified by a positive nucleic acid amplification test (NAAT) within 14 days prior to randomization;
  • Receipt of antibiotics active against N. gonorrhoeae in the prior 14 days, including oral or parenteral antibiotics;
  • Progressive, unstable, or uncontrolled disease including but not limited to cardiac, hepatic, renal, immunological, neurological or psychiatric conditions;
  • Use of any investigational drug (with the exception of an authorized or approved COVID-19 vaccine) within 30 days prior to enrollment, or planned/anticipated use during study participation;
  • Has received or plans to receive a live vaccine within +/- 30 days, an inactive vaccine within +/- 14 days, or an influenza vaccine within +/- 7 days from receipt of study product;* *Authorized or approved, inactivated COVID-19 vaccines may be given more than 7 days +/- receipt of study product for all study participants.
  • Currently receiving immunosuppressive agent or systemic corticosteroid (dose >/=5 mg/day of prednisone) for > 14 consecutive days within 90 days prior to enrollment*; *Topical or inhaled steroids allowed, unless applied to study project injection site.
  • Has received antineoplastic, or radiotherapy within 90 days prior to enrollment;
  • Has received immunoglobulins and/or any blood products within 180 days prior to enrollment;
  • Known or confirmed hypersensitivity to any of the vaccine constituents, medical products, or medical equipment whose use is foreseen in this study;
  • HIV-infected participants with CD4 cell count < 300 cells/mm3 in the last year;
  • Has a condition which in the opinion of the investigator is not suitable for intramuscular vaccination, blood draws, or participation in the trial;
  • Participant is breastfeeding.

Join this Trial

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Study Stats
Protocol No.
Healthy Volunteers
  • UCLA Santa Monica
  • UCLA Westwood
For Providers
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