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UConn

Six Cases, a Winter Break Warning, and State Law Exclusion Powers: UConn's Mumps Outbreak

CTdisease outbreakadvisorymedium confidence
Confirmed Threat

On December 23, 2019, the University of Connecticut Student Health and Wellness office sent an all-student notification confirming three cases of mumps among Storrs campus students during the fall 2019 semester, with the total reaching six cases by the time the outbreak was declared over January 19, 2020. A follow-up secure message on December 30 targeted students identified as higher risk, and the Connecticut Department of Public Health invoked state law authorizing exclusion of unvaccinated students from campus.

Alerts
3
Response
Killed
Injured
Institution
University of Connecticut
Public R1 · CT
~32,000 studentsUConn Emergency Notification
Confirmed Timeline

Alert Sequence

3 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 ALERTEmail
This message is to inform you that University of Connecticut Student Health and Wellness, in conjunction with the Connecticut Department of Public Health, has identified three cases of mumps in students that were enrolled on the Storrs campus in the fall 2019 semester. Mumps is a viral infection spread through infected respiratory droplets, such as from sneezing or coughing. It is not usually dangerous but can be painful. Typical signs and symptoms include swelling of the face, cheeks, or jaw (parotitis), jaw pain, headache, and/or low grade fever. Symptoms develop within 12 to 25 days of exposure. If you experience these symptoms, contact your health care provider and inform them you may have been exposed to mumps. Please do not go to the emergency room without calling first.

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

The notification was sent December 23 -- during winter break, when many students had already returned home -- reflecting both the urgency of the disclosure and the challenge of reaching students who may have already been dispersed across the country.
The instruction to 'not go to the emergency room without calling first' is a critical triage message designed to prevent overwhelmed ERs and to allow infection-control staff to prepare for potentially contagious patients.
The three initial cases grew to six by the time the outbreak was declared over January 19, 2020 -- a timeline consistent with mumps' 12-25 day incubation period allowing sequential transmission chains.
UPDATEPush
You are receiving this message because you have been identified as being at higher risk for contracting mumps based on potential contact with infected students, your immunization status, or a combination of both. A third dose of the MMR vaccine is recommended for students at higher risk. UConn Student Health and Wellness can provide this vaccine. Per Connecticut state law, students who have not been immunized or cannot provide documentation of immunity to mumps may be excluded from the Storrs campus during this outbreak. Please review the information provided and contact Student Health and Wellness if you have questions.

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

The 'secure message' system targeting only at-risk students is a targeted communication approach that avoids unnecessary alarm to the broader campus population while ensuring actionable information reaches those who need it.
The recommendation of a third MMR dose for high-risk students reflected emerging evidence from the 2016-2019 mumps resurgence that two-dose MMR immunity wanes in densely housed college populations.
Connecticut's legal authority to exclude unvaccinated students from campus during a mumps outbreak -- invoked here -- is a state public health power that was used at several campuses during the 2016-2019 national mumps resurgence.
ALL CLEARWebsite
In accordance with the guidelines from the Centers for Disease Control and the recommendations from the Connecticut Department of Public Health, the mumps outbreak on the Storrs campus has concluded. The last confirmed case occurred in late December. We appreciate the campus community's cooperation in reporting symptoms and complying with vaccination requirements. Students who have questions about their immunization status should contact Student Health and Wellness.

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

The January 19, 2020 all-clear came 27 days after the initial December 23 notification -- covering the full maximum incubation period (25 days) beyond the last confirmed case with no new transmissions, satisfying CDC outbreak closure criteria.
The mention of 'complying with vaccination requirements' implicitly references the state-law exclusion authority invoked for unvaccinated students -- an unusual legal mechanism that was a significant part of the outbreak response.
The outbreak's end in mid-January 2020 coincided with the return from winter break; the absence of new cases on campus reopening was the key epidemiological signal for the closure declaration.
Context

Background

UConn's fall 2019 mumps outbreak was part of a national resurgence of mumps on US college campuses that began around 2016, driven partly by waning immunity in populations that received two-dose MMR vaccines in childhood. Between 2016 and 2019, more than 6,500 mumps cases were reported nationally, with college campuses disproportionately affected. UConn's outbreak -- six cases on the Storrs campus, identified December 23, 2019 -- was managed through a two-tier communication strategy: an all-campus email on December 23 for general awareness, followed by a targeted secure message on December 30 to students identified as higher risk. The Connecticut Department of Public Health invoked state law authorizing exclusion of unvaccinated students from campus -- a significant legal authority used at several institutions during the national resurgence. A third MMR dose was recommended for high-risk students, reflecting emerging evidence that two-dose immunity wanes in the dense residential environments of large universities. NBC Connecticut and CBS New York reported the initial three cases; the outbreak was declared over January 19, 2020.
Analysis

Key Findings

A two-tier communication strategy was used: a general all-campus email December 23, followed by a targeted secure message December 30 to higher-risk students identified through contact tracing
Connecticut state law authorizing exclusion of unvaccinated students from campus was invoked -- a significant but underreported legal tool used during the national 2016-2019 mumps resurgence
A third MMR dose was recommended for high-risk students, reflecting emerging evidence that two-dose immunity wanes in the dense residential settings of large universities
The outbreak concluded January 19, 2020 -- covering the full maximum incubation period beyond the last confirmed late-December case
Outcome
Six total cases were identified on the Storrs campus. The outbreak concluded January 19, 2020. Per Connecticut law, students without documented MMR vaccination or immunity were subject to exclusion from campus during the outbreak period.
Provenance

Sources

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  4. News
  5. News
Tags
mumpsdisease-outbreakpublic-healthmmr-vaccineconnecticutadvisorystate-lawwinter-break
Added May 2026Updated May 2026Via ingestion