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Ask the Experts: Meningococcal B

Results (36)

Meningococcal disease is a bacterial infection caused by Neisseria meningitidis. Meningococcal disease usually presents clinically as meningitis (about 50% of cases), bacteremia (30% of cases), or bacteremic pneumonia (15% of cases). N. meningitidis colonizes mucosal surfaces of the nasopharynx and is transmitted through direct contact with large-droplet respiratory tract secretions from patients or asymptomatic carriers. Meningococcal disease can be severe. The overall case-fatality ratio in the U.S. is 15%, and 10%–20% of survivors have long-term sequelae such as neurologic disability, limb or digit loss, and hearing loss.

N. meningitidis is classified into 12 serogroups based on characteristics of the polysaccharide capsule. Most invasive disease (such as meningitis and sepsis) is caused by serogroups A, B, C, W, X and Y. The relative importance of serogroups depends on geographic location and other factors such as age. Between 2011 and 2020 in the United States, serogroup B caused about 60% of cases among children younger than 5 years old, and serogroups C, W, or Y caused about two out of three cases in people age 11 years or older. Serogroup A is rare in the U.S. Historically, serogroup A was common in the meningitis belt of sub-Saharan Africa, but after the implementation of a meningococcal serogroup A conjugate vaccine campaign, serogroup A disease has been nearly eliminated in the meningitis belt.

Nasopharyngeal carriage rates are highest in adolescents and young adults who serve as reservoirs for transmission of N. meningitidis.

Last reviewed: July 15, 2023

The incidence of meningococcal disease has declined steadily in the U.S. since a peak of reported disease in the late 1990s. Even before routine use of a meningococcal conjugate vaccine against serogroups A, C, W, and Y (MenACWY) was recommended for adolescents in 2005, the overall annual incidence of meningococcal disease had decreased 64%, from 1.1 cases per 100,000 population in 1996 to 0.4 cases per 100,000 population in 2005. In 2020, the rate of meningococcal disease in the United States reached a historic low of 0.07 cases per 100,000 population.

In 2020, of U.S. cases with known serogroup, 55 cases were serogroup B (incidence rate of 0.02 cases per 100,000 population) and 119 cases were serogroups C, Y, or W. The incidence of disease is extremely low in all age groups, but is highest in infants under 1 year (0.43 cases per 100,000), children age 1 through 4 years (0.12 cases per 100,000), and adolescents age 16–23 (0.09 cases per 100,000 years).

Last reviewed: July 15, 2023

In addition to risk based on age, non-specific risk factors for serogroups A, C, W and Y include having a previous viral infection, living in a crowded household, having an underlying chronic illness, and being exposed to cigarette smoke (either directly or second-hand).

The following groups are at increased risk for all meningococcal serogroups:

  • People with persistent (genetic) complement component deficiencies (a type of immune system disorder)
  • People who use complement inhibitors such as eculizumab (Soliris, Alexion Pharmaceuticals) and ravulizumab (Ultomiris, Alexion Pharmaceuticals) for treatment of atypical hemolytic uremic syndrome or paroxysmal nocturnal hemoglobinuria
  • People with anatomic or functional asplenia
  • Microbiologists routinely exposed to meningococcal isolates in a laboratory
  • People at increased risk during an outbreak of meningococcal disease
  • Military recruits
  • College students

Certain groups are at increased risk of serogroups A, C, W and Y, but not serogroup B:

  • People living with HIV
  • Men who have sex with men (MSM)
  • Travelers to countries where meningococcal disease is endemic or hyperendemic, such as the meningitis belt of sub-Saharan Africa
Last reviewed: July 15, 2023

The vaccines for meningococcal serogroups A, C, W, and Y (MenACWY; Menactra or MenQuadfi by Sanofi; Menveo by GSK) contain meningococcal conjugate in which the surface polysaccharide is chemically bonded (“conjugated”) to a protein to produce a robust immune response to the polysaccharide. Although each of the 3 MenACWY vaccine products uses a different protein conjugate, the products are considered interchangeable; the same vaccine product is recommended, but not required, for all doses.

A discontinued meningococcal polysaccharide vaccine (MPSV4, Menomune, Sanofi) was available in the United States until all doses expired in September 2017. With rare exception, it was not interchangeable with MenACWY conjugate vaccines.

Since late 2014, vaccines have become available that offer protection from meningococcal serogroup B disease (MenB; Bexsero by GSK; Trumenba by Pfizer). These vaccines are composed of proteins found on the surface of the bacteria. These vaccine products are not interchangeable; the same vaccine product is required for all doses.

MenACWY vaccines provide no protection against serogroup B disease, and meningococcal serogroup B vaccines (MenB) provide no protection against serogroup A, C, W, or Y disease. For protection against all 5 serogroups of meningococcus, it is necessary to receive both MenACWY and MenB.

Trade Name Type of Vaccine Serogroups Year Licensed Approved Ages
Menactra Conjugate A, C, W, Y 2005 9 mos.–55 years*
Menveo (two vial)
Menveo (one vial)		 Conjugate
Conjugate		 A, C, W, Y
A, C, W, Y		 2010
2022		 2 mos.–55 years*
10–55 years
MenQuadfi Conjugate A, C, W, Y 2020 2 years and older
Trumenba Protein B 2014 10–25 years*
Bexsero Protein B 2015 10–25 years*

*May be given to adults at increased risk older than the FDA-approved upper age limit (see ACIP recommendations, Table 11, page 41, www.cdc.gov/mmwr/volumes/69/rr/pdfs/rr6909a1-H.pdf)

Last reviewed: July 15, 2023

The most current comprehensive recommendations from the Advisory Committee on Immunization Practices (ACIP) for meningococcal vaccines is available on the MMWR website at www.cdc.gov/mmwr/volumes/69/rr/pdfs/rr6909a1-H.pdf. This document replaces all previously published reports and policy notes.

Last reviewed: July 15, 2023

MenB is routinely recommended for these groups:

  • People age 10 years and older who have functional or anatomic asplenia (including sickle cell disease)
  • People age 10 years and older who have persistent complement component deficiency (an immune system disorder) or who take a complement inhibitor such as eculizumab (Soliris, Alexion Pharmaceuticals) or ravulizumab (Ultomiris, Alexion Pharmaceuticals)
  • People age 10 years and older who are exposed during an outbreak caused by serogroup B
  • Microbiologists who work with meningococcal isolates in a laboratory

For adolescents and young adults not otherwise at increased risk for meningococcal B disease, ACIP recommends that a MenB series may be administered to people 16 through 23 years of age (preferred age 16 through 18 years) on the basis of shared clinical decision-making. The shared clinical decision-making recommendation allows the clinician and patient to decide together based upon the risks and benefits of vaccination for the individual patient.

Last reviewed: July 15, 2023

The change from “Category B” to “shared clinical decision-making” was done to describe more clearly the intent of the recommendation that the patient should be informed of the option to be vaccinated against meningococcal serogroup B disease and that the decision to vaccinate against MenB should be made by the provider and patient together. ACA requires coverage of vaccines as indicated on the recommended immunization schedule, including vaccines with shared clinical decision-making recommendations. The Vaccines for Children (VFC) program also covers vaccines recommended for shared clinical decision-making.

Last reviewed: July 15, 2023

To assist with the shared clinical decision-making around the option to vaccinate against meningococcal serogroup B disease and the timing of vaccination, CDC has provided some specific considerations about the disease and the vaccine that the patient and provider may weigh:

  • Serious nature of invasive meningococcal serogroup B infection, with a high risk of death and permanent complications
  • Low level of serogroup B disease in the United States, with an average of 34 cases each year among people age 16 through 23 years between 2015 and 2018, declining to 9 cases in 2020.
  • Increased risk among college students, especially those who are freshmen, attending a 4-year university, living in on-campus housing, or participating in sorority and fraternity life
  • Protection of MenB vaccine against most strains of meningococcal serogroup B bacteria
  • Estimated relatively short duration of MenB vaccine protection, with antibody levels waning within 1–2 years of completing the primary series; however, if a booster is indicated (e.g., during an outbreak) antibody titers rise in one to two weeks after booster dose administration
  • Evidence to date suggests no impact of MenB vaccine on meningococcal B carriage (may protect an individual from invasive disease but is unlikely to impact transmission of the bacteria to others)
Last reviewed: July 15, 2023

MenB vaccines were approved based on the serologic response to the vaccine. No data are available on vaccine effectiveness against clinical disease or duration of protection against clinical disease. Short term protection refers to the known duration of the antibody response. Available data indicate that protective antibody levels wane in most recipients within 1–2 years of completion of the primary series.

Last reviewed: July 15, 2023

Several small outbreaks of meningococcal serogroup B disease have occurred on college campuses since 2013. However, the disease incidence in college students remains very low (0.03 cases per 100,000 college students age 18 to 24 years in 2020). ACIP does not routinely recommend MenB vaccine for college students. However, the recommendation for shared clinical decision-making applies to all college students age 16 through 23 years who may choose to receive MenB vaccine to reduce their risk of meningococcal serogroup B disease. In addition, some colleges and universities require MenB vaccination for incoming students.

If a college student completes the MenB vaccine series at least 6 months to 1 year before being identified as at risk during an outbreak, a single booster dose of the same brand can boost levels of protective antibodies within 1-2 weeks. The ability to be protected quickly during an outbreak by a single booster dose may be an important consideration for college students, families, and administrators when deciding about getting the MenB vaccine primary series.

Last reviewed: July 15, 2023

Trumenba (MenB-Fhbp, Pfizer) is either a 2-dose series with doses administered at least 6 months apart or a 3-dose series with the second and third doses administered 1–2 and 6 months after the first dose. Bexsero (MenB-4C, GSK) is a 2-dose series with doses given at least 1 month apart.

Last reviewed: July 15, 2023

Healthy adolescents who are not at increased risk for meningococcal B disease should receive 2 doses of Trumenba (MenB-FHbp) administered at 0 and 6 months. If the second dose is given at an interval of less than 6 months, a third dose should be given at least 4 months after the 2nd dose.

For people age 10 years and older at increased risk for meningococcal B disease, 3 doses of Trumenba should be administered at 0, 1–2, and 6 months. The 3-dose series should be used for all people with functional or anatomic asplenia, people with persistent complement component deficiency (an immune system disorder) or those who take a complement inhibitor (eculizumab [Soliris] or ravulizumab [Ultomiris]), microbiologists who work with meningococcal isolates in a laboratory, and people exposed during serogroup B outbreaks.

Last reviewed: July 15, 2023

No. The 3-dose series (at 0, 1–2 and 6 months) is intended to rapidly induce immunity to serogroup B meningococcal bacteria. If a microbiologist or other person at increased risk has received 2 doses of Trumenba separated by 6 months their vaccine series can be considered to be complete.

Last reviewed: July 15, 2023

The only way to meet the school entry deadline for a complete series by September would be to restart a primary series with Bexsero (MenB-4C), which requires two doses spaced at least 4 weeks apart. You must wait a minimum of 4 weeks after the Trumenba dose to initiate the Bexsero series.

Last reviewed: July 15, 2023

The patient can complete the series with either vaccine. If Bexsero (MenB-4C) is chosen, the second and final dose should be administered at least 1 month after yesterday’s dose. If Trumenba (MenB-FHbp) is chosen and the patient is healthy (i.e., does not have a high-risk condition for meningococcal B disease such as asplenia), the second and final dose of Trumenba should be administered at least 4 months after yesterday’s Bexsero dose (6 months after the first Trumenba dose). If the person is at increased risk for meningococcal B disease and Trumenba is being used, a second Trumenba dose should be administered 1 month after yesterday’s Bexsero dose and a third dose should be administered 4 months after the second Trumenba dose.

Last reviewed: July 15, 2023

Immunize.org has prepared a document that provides a summary of the ACIP recommendations for use of MenB. The document is available at www.immunize.org/catg.d/p2035.pdf.

Last reviewed: July 15, 2023

No. The ACIP meningococcal serogroup B vaccine recommendations state that the same vaccine must be used for all doses in the MenB series, including booster doses. If the brand of a previous dose is unavailable or cannot be determined, restart the primary series with the available brand.

Last reviewed: July 15, 2023

Yes. The 2020 ACIP recommendations for MenB include a booster dose schedule for MenB vaccination of people at high risk for meningococcal serogroup B disease. The first booster dose is recommended one year after completion of the primary series, with a subsequent booster dose administered every 2–3 years thereafter, as long as risk remains. Because MenB vaccine brands are not interchangeable, all doses, including booster doses, should be of the same MenB brand. If the brand of the primary series is not known or not available, CDC recommends restarting the primary series with the available product.

Last reviewed: July 15, 2023

Eculizumab (Soliris) and the related long-acting compound, ravulizumab (Ultomiris) bind to C5 and inhibit the terminal complement pathway. People with persistent complement component deficiency due to an immune system disorder or use of a complement inhibitor are at increased risk for meningococcal disease even if fully vaccinated. This patient should be given a series of MenACWY vaccine, MenACWY (2 doses separated by at least 8 weeks) and a 2- or 3-dose series (depending on brand) of MenB vaccine. The patient should receive regular booster doses of MenACWY and MenB as long as he remains at risk: a booster dose of MenACWY every 5 years and a booster dose of MenB one year after completion of the primary series, followed by a booster dose of MenB every 2–3 years thereafter.

Because patients treated with complement inhibitors can develop invasive meningococcal disease despite vaccination, clinicians using Soliris or Ultomiris also may consider antimicrobial prophylaxis for the duration of complement inhibitor therapy.

Last reviewed: July 15, 2023

Recommendations to separate MenACWY and PCV only apply to one of the three MenACWY vaccines, MenACWY-D (Menactra), and also only apply to individuals with functional or anatomic asplenia or HIV infection. So, you do may administer the recommended vaccines at the same time. A 10-year-old with persistent complement component deficiency also should receive a 2- or 3-dose series (depending on brand) of MenB vaccine.

As long as the child remains at high risk of meningococcal disease due to complement inhibitor use, booster doses of both MenACWY and MenB are recommended. A MenACWY booster dose should be given every 5 years and a MenB booster dose should be given one year after the completion of the primary series, followed by a booster dose every 2–3 years thereafter.
Because patients treated with complement inhibitors can develop invasive meningococcal disease despite vaccination, clinicians using Soliris or Ultomiris also may consider antimicrobial prophylaxis for the duration of complement inhibitor therapy.

Last reviewed: July 15, 2023

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