Study to Assess the Safety and Immunogenicity of a Single Dose of a Quadrivalent Meningococcal (MenACYW) Conjugate Vaccine in Older Adults Who Received a Primary Vaccination (3 or More Years Earlier) in Study MET49

Summary

Primary Objective: To demonstrate sufficiency of the vaccine seroresponse to meningococcal serogroups A, C, W, and Y following administration of a single dose of Meningococcal Polysaccharide (Serogroups A, C, Y, and W 135) Tetanus Toxoid (MenACYW) Conjugate vaccine to Group 1 participants (who received primary vaccination with Menomune vaccine greater than or equal to \[\>= 3\] years earlier at \>= 56 years of age in Study MET49). Secondary Objectives: Secondary Objective 1 - To demonstrate sufficiency of the vaccine seroresponse to meningococcal serogroups A, C, W, and Y following administration of a single dose of MenACYW Conjugate vaccine to Group 2 participants (who received primary vaccination with MenACYW Conjugate vaccine \>= 3 years earlier at \>= 56 years of age in Study MET49). Secondary Objective 2 - To describe vaccine seroresponse rates with respect to serogroups A, C, W, and Y in serum specimens collected 6 days (window, 5-7) post-vaccination in approximately 60 participants from Group 1 (Menomune-primed) and approximately 60 participants from Group 2 (MenACYW Conjugate vaccine-primed). Secondary Objective 3 - To describe antibody persistence \>= 3 years after primary vaccination with Menomune vaccine or MenACYW Conjugate vaccine for participants from all groups.

Timeline

Start

2019-10-04

Primary completion

2020-04-01

Completion

2022-05-25

Publications

• Robertson CA, Jacqmein J, Selmani A, Galarza K, Oster P. Immune persistence and booster response of a quadrivalent meningococcal conjugate vaccine (MenACYW-TT) 5 years after primary vaccination of adults at >/=56 years of age. Hum Vaccin Immunother. 2024 Dec 31;20(1):2426868. doi: 10.1080/21645515.2024.2426868. Epub 2024 Nov 18.
• Robertson CA, Jacqmein J, Selmani A, Galarza K, Oster P. Immunogenicity and safety of a quadrivalent meningococcal conjugate vaccine (MenACYW-TT) administered as a booster to adults aged >/=59 years: A phase III randomized study. Hum Vaccin Immunother. 2023 Dec 31;19(1):2160600. doi: 10.1080/21645515.2022.2160600. Epub 2023 Jan 11.

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Indications