Think Out Loud

Health officials warn Oregon measles outbreak is growing

By Gemma DiCarlo (OPB)
April 22, 2026 1 p.m.

Broadcast: Wednesday, April 22

FILE - This undated image made available by the Centers for Disease Control and Prevention on Feb. 4, 2015 shows an electron microscope image of a measles virus particle, center. (Cynthia Goldsmith/Centers for Disease Control and Prevention via AP)

FILE - This undated image made available by the Centers for Disease Control and Prevention on Feb. 4, 2015 shows an electron microscope image of a measles virus particle, center. (Cynthia Goldsmith/Centers for Disease Control and Prevention via AP)

Cynthia Goldsmith / AP

As of last week, Oregon had reported 20 measles cases since the start of 2026. Measles was declared eradicated in the U.S. in 2000, but falling vaccination rates have driven outbreaks in more than half of U.S. states so far this year. Health officials warn that community transmission in Oregon is beginning to grow and have asked for the public’s help in curbing the spread.

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Dean Sidelinger is a health officer and state epidemiologist for the Oregon Health Authority. He joins us with more details about where the outbreak stands and how people can stay safe.

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