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SDSU

Three Confirmed Meningococcal B Cases Push SDSU Into a County-Declared Outbreak

CAdisease outbreakemergency notificationmedium confidence
Confirmed Threat

On September 28, 2018, the San Diego County Health and Human Services Agency declared a meningococcal disease outbreak at San Diego State University after a third case of serogroup B meningococcal disease was confirmed in an SDSU student. The university responded with mass vaccination clinics at Viejas Arena and a campuswide health advisory urging undergraduates under 24 to get one of the two licensed MenB vaccines. A fourth case in April 2019 eventually led SDSU to require MenB vaccination for all incoming students starting fall 2019.

Alerts
2
Response
Killed
0
Injured
4
Institution
San Diego State University
Public R2 · CA
~35,000 studentsSDSU NewsCenter / Student Health Services
Confirmed Timeline

Alert Sequence

2 messages in sequence

Some alert texts below are approximate reconstructions from news coverage, not confirmed verbatim transcripts. Reconstructed texts are shown in italic with a dashed border. Verified verbatim texts have a solid border and are marked accordingly.

INITIAL ALERTWebsite
An additional case of meningococcal meningitis has been confirmed in a San Diego State University student. This is the third case at SDSU in the past several months, and the County of San Diego Health and Human Services Agency has declared this a meningococcal disease outbreak. County Public Health Officer Wilma Wooten, M.D., M.P.H., is recommending that all unimmunized SDSU undergraduate students under the age of 24 get vaccinated with one of two available meningococcal B vaccines. SDSU is working with the County to host vaccination clinics on campus. The first two clinics will be held at Viejas Arena on Friday, October 5, and Monday, October 8. Meningococcal disease is a rare but serious illness caused by bacteria. It can become very severe, very quickly. Anyone who has symptoms — including high fever, severe headache, stiff neck, nausea, vomiting, or a rash — should seek medical attention immediately.

This text has been reconstructed from news coverage and may not reflect the exact original wording.

Reconstructed from the language used in SDSU NewsCenter and the San Diego County News Center announcement of the same day
The third case is what triggered the formal outbreak declaration under CDC criteria for university-associated meningococcal disease
Specifies both available MenB vaccines (Bexsero and Trumenba) without naming brands, mirroring official phrasing
UPDATEWebsite
Update: A fourth case of meningococcal disease has been confirmed in an SDSU student. The student is receiving treatment. Close contacts have been notified and offered preventive antibiotics. SDSU and the County of San Diego continue to strongly recommend that all unimmunized undergraduate students under age 24 receive a meningococcal B (MenB) vaccine. Two doses are required for full protection. Vaccinations are available at Student Health Services and through community providers. Symptoms of meningococcal disease can develop rapidly and include fever, severe headache, stiff neck, sensitivity to light, nausea, vomiting, and a rash. If you have any of these symptoms, seek medical care immediately and tell the provider you may have been exposed to meningococcal disease.

This text has been reconstructed from news coverage and may not reflect the exact original wording.

Reconstructed from the San Diego County Public Health outbreak situation page describing the fourth case
The fourth case in April 2019 was the proximate trigger for SDSU's mandatory MenB vaccine policy announced in May 2019
Reflects the pattern of MenB outbreaks taking 6-18 months to fully resolve due to the two-dose vaccine schedule
Context

Background

San Diego State University's 2018-2019 meningococcal B outbreak was one of the most consequential university-based MenB outbreaks of the decade because it produced a permanent vaccine policy change. The outbreak began with two cases in summer 2018 and was formally declared on September 28, 2018 when a third SDSU student was diagnosed with serogroup B meningococcal disease. Under CDC guidance, three or more cases of the same serogroup at a single institution within a defined period meets the threshold for an outbreak declaration, which then unlocks expanded recommendations for vaccination of the at-risk population. SDSU and the San Diego County Health and Human Services Agency responded by hosting mass vaccination clinics at Viejas Arena, the campus's basketball arena, in October 2018. UCSD's Student Health Services warned its own students about the SDSU outbreak given the high level of social mixing between San Diego campuses. A fourth case was confirmed in April 2019, prompting SDSU to announce — in May 2019 — that all incoming students starting fall 2019 would be required to be fully vaccinated against meningococcal serogroup B as a condition of enrollment, making SDSU one of the first U.S. universities to mandate MenB vaccination. By the conclusion of the response, approximately 9,000 SDSU students had received at least one MenB dose. The outbreak followed a recognized national pattern of serogroup B meningococcal outbreaks on U.S. college campuses between 2013 and 2018, including outbreaks at Princeton, UCSB, the University of Oregon, and Oregon State University.
Analysis

Key Findings

The outbreak was formally declared on September 28, 2018 after the third confirmed case at SDSU within a defined period
SDSU held mass vaccination clinics at Viejas Arena on October 5 and 8, 2018, vaccinating roughly 9,000 students over the response period
A fourth case in April 2019 prompted SDSU to mandate MenB vaccination for all incoming students starting fall 2019
The case fits the pattern of 10+ U.S. university MenB outbreaks documented by CDC between 2013 and 2018
Outcome
Three SDSU students were hospitalized in 2018 and a fourth in April 2019. No SDSU students died. By the end of the outbreak response, approximately 9,000 students had received at least one MenB vaccine dose, and SDSU announced a mandatory MenB vaccine requirement for incoming students.
Provenance

Sources

  1. Official
  2. Official
  3. Official
  4. News
  5. Student Paper
  6. Source
Tags
meningitismeningococcal-bdisease-outbreakpublic-healthvaccinationsan-diego-statecaliforniavaccine-mandateviejas-arena
Added May 2026Updated May 2026Via ingestion