Oregon Faces Worst Measles Outbreak in Decades

Vaccine hesitancy and declining immunity fuel public health crisis

Mar. 31, 2026 at 3:25pm by Ben Kaplan

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A highly detailed, translucent X-ray image of a measles virus particle, revealing its intricate internal structure against a dark background, conceptually illustrating the public health crisis unfolding in Oregon.An X-ray view of the measles virus highlights the clinical urgency of the outbreak spreading across Oregon.Portland Today

Oregon is on track to experience its worst measles outbreak in decades, with cases surging across the state. Health officials attribute the rise to growing vaccine hesitancy, declining immunity, and the spread of misinformation about vaccine safety. The outbreak has already led to multiple hospitalizations, including a young patient who developed life-threatening complications from treatment.

Why it matters

Measles is a highly contagious disease that can lead to serious complications, especially in young children. The current outbreak in Oregon highlights the public health risks posed by declining vaccination rates and the spread of anti-vaccine rhetoric, which threaten to erode hard-won progress against vaccine-preventable diseases.

The details

The measles outbreak in Oregon has already resulted in dozens of confirmed cases, with health officials warning that the state is on pace to see its worst measles year in decades. Experts say the surge is driven by a combination of vaccine hesitancy, waning immunity from past vaccinations, and the spread of misinformation about vaccine safety on social media.

  • The current measles outbreak in Oregon began in early 2026.
  • Kai Bonneau, a young patient, was hospitalized twice in a matter of weeks this year due to a drug-resistant infection and complications from antibiotics.

The players

Randall Children's Hospital

A pediatric hospital in Portland, Oregon that has treated patients affected by the measles outbreak.

Kai Bonneau

A young patient who was hospitalized twice in 2026 due to a drug-resistant infection and complications from antibiotics.

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What they’re saying

“We're seeing the consequences of declining vaccination rates and the spread of misinformation about vaccine safety. This outbreak is putting children's lives at risk.”

— Dr. Emily Chen, Pediatrician, Randall Children's Hospital

What’s next

Health officials are urging all eligible Oregonians to get vaccinated against measles to help contain the outbreak and prevent further spread of the disease.

The takeaway

The measles outbreak in Oregon underscores the critical importance of maintaining high vaccination rates to protect vulnerable populations and prevent the resurgence of vaccine-preventable diseases. This crisis highlights the need for continued public education and efforts to address vaccine hesitancy.