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Non-household measles outbreaks
A non-household measles outbreak is defined as 3 or more epidemiologically linked cases who live in separate households. To date, there has been 1 non-household outbreak reported in Oregon. Information on newly reported non-household measles outbreaks are below:
Outbreak onset date
| Counties affected |
|---|
| 4/11/2026 | Clackamas, Multnomah
|
|---|
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Prevention
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Measles is a very contagious, airborne disease.
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Measles starts with a fever, runny nose, cough, red eyes and sore throat, and is followed by a blotchy rash that starts on the face or at the hair line and then spreads all over the body.
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Young children and adults are at risk for becoming more sick.
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The best protection against measles is
the MMR (measles-mumps-rubella) vaccine.
Disease information
How to prepare
Schools and Child Care Facilities
Infographics
Healthcare Partners
Disease Reporting
What is required?
All cases and outbreaks are reportable to local public health authorities (LPHAs) by individuals, health care providers and clinical laboratories. Providers should err on the side of immediate reporting by contacting their
LPHA even if unsure whether a case is really measles.
Cases are subject to
worksite, childcare and school restrictions while in the communicable stage of the disease (within 21 days of rash onset). When the disease is no longer communicable,
restrictions will be removed by the local public health authority.
Clinical Signs and Symptoms
Early prodromal symptoms of measles include high fever, cough, runny nose (coryza), and conjunctivitis (eye redness). These non-specific symptoms may be followed 2-3 days later by Koplik spots (1-2 mm white spots on the buccal mucosa). Measles rash appears 3-5 days after prodromal symptoms and typically appears first on the head or neck, spreading down the body to affect the trunk, arms, legs and feet. The measles rash is maculopapular and may coalesce or join together as it spreads. Additional information about the signs and symptoms of measles is available from the
CDC. Refer to the
clinical algorithm for suspected measles cases for additional guidance.
Health Care Providers and Clinical Laboratories
Health care providers and clinical laboratories are
required by law to report cases and suspect cases of measles to local health departments
immediately, day or night.
Clinical Guidelines
Vaccination and Prophylaxis
Local Public Health
Investigative Guidelines & Case Report Form
Additional Resources
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