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US measles epidemic.

South Carolina measles outbreak reaches 997 cases (CIDRAP, Mar 17, 2026)
Of the 997 cases, 639 are among children ages 5 to 17 years, and 263 and in those are under the age of 5 years. Only 87 infections have been in adults, and eight are unknown. The vast majority case-patients (932 [94%]) are unvaccinated, and 20 are partially vaccinated with one dose of measles-containing vaccine. Twenty are fully vaccinated, and 19 have unknown vaccination status.
So far the United States has tracked 1,362 measles cases since January 1, putting the nation on track for a record-setting year.

Colorado, North Dakota report new cases​

Measles cases are being reported in 30 states across the country. In Colorado, one new case raises the state total this year to 11, nine of which were confirmed this month.
North Dakota is reporting 26 cases so far this year, including four requiring hospitalization. Three of the cases are new. Until last year, the state had not seen any measles activity since 2011. Eighteen of the 26 confirmed case-patients were unvaccinated, but six were fully vaccinated.
Twenty-three cases have been confirmed in Pembina County, with one case each in Williams, Walsh and Traill counties.
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Measles outbreaks slow in South Carolina, Arizona, but Utah sees cases skyrocket past 400 (CIDRAP, Mar 11, 2026)
As US measles cases top 1,300, report details last year’s outbreak in New Mexico (CIDRAP, Mar 13, 2026)
 
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University of Kent, Texas measles outbreaks, dengue in Samoa (CIDRAP, Mar 18, 2026)
The University of Kent’s meningitis outbreak is growing quickly, with 20 confirmed or probable cases now reported. Six cases have been confirmed to be caused by the meningitis B strain, or MenB. “This looks like a super-spreader event, with ongoing spread within the halls of residence in the universities. There will have been some parties particularly around this, so there will have been lots of social mixing,” said the chief executive of the UK Health Security Agency, Susan Hopkins. Thousands of students have been offered prophylactic antibiotics after the first cases were discovered over the weekend.
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US measles outbreak approaches 1,500 cases (CIDRAP, Mar 20, 2026)
With 125 new measles cases confirmed today, the US total has reached 1,487 measles infections, and the outbreak is on track to surpass last year’s outbreak numbers—which reflected a 35-year high—before summer. The Centers for Disease Control and Prevention (CDC) reported the new data in an update today.
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South Carolina: No new measles cases in Upstate outbreak (CIDRAP, Mar 25, 2026)
According to the Greenville News, the outbreak will be officially over on April 26 if no new cases are reported; that date will mark 42 days with no new cases, or two measles transmission cycles.
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Quick takes: Measles spike in Utah, 5 kids ill from raw milk, CDC director uncertainty (CIDRAP, Mar 25, 2026)
Utah officials reported 43 new measles cases in the past week, raising the state total to 486 cases in an outbreak that began last year and shows little signs of slowing down. Almost half, or 233, of the cases are in the Southwest Utah Health District, where the outbreak started. But now the outbreak has spread across much of the state, including 78 cases in Utah County, 53 in Salt Lake County, and 36 in Central Utah. Of the total, 289 cases have been confirmed already this year, compared with 197 for all of 2025.
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Montreal's Sainte-Justine hospital flagged as measles exposure site in latest outbreak (CBC.ca, Mar 24, 2026)
🇨🇦 lost its measles-free status in November 2025.
 
Utah, 🇺🇸, again:
Utah measles outbreak tops 600 cases, now most active in the US (CIDRAP, April 15, 2026)
Yesterday Utah officials said the state has 602 measles cases in an outbreak that is ongoing and began last year, with 19 new infections. And though cases have been slightly declining in recent weeks, several preschools and elementary schools are now sites of recent exposures.
(...)
With roughly 90% of Utahns are vaccinated against measles, officials said there are enough unvaccinated people living in the state to allow the virus to spread easily, as 95% coverage typically provides “herd immunity” to also protect the unvaccinated.
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US measles outbreak shows signs of slowing as WHO notes millions of lives saved in Africa by vaccination (CIDRAP, April 17, 2026)
With 34 new infections, the US measles case count hit 1,748 today, according to a weekly update from the Centers for Disease Control and Prevention (CDC). This is the smallest weekly increase so far this year; last week saw 43 new cases, and the week before 96 additional cases.
The numbers come as new data from Africa show that millions of lives have been saved through measles vaccination in recent years.
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CDC confirms 59 new measles cases, 1,952 total (CIDRAP, May 22, 2026)
As the nation moves closer to topping last year’s measles total in just the first half of 2026, the Centers for Disease Control and Prevention (CDC) today confirmed 59 new cases in a nationwide outbreak that has now reached 1,952 infections.
(...)
According to the CDC measles map, South Carolina has recorded the most cases so far this year, at 669, though its outbreak is now over. Utah is next, with 482 cases—although the Utah health department lists 474, eight more than last week. Parents with students at schools in Heber City in Wasatch County, Utah, are being encouraged to keep unvaccinated children home after two new cases in students.
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Analysis of Texas measles outbreak shows just how dangerous virus is (ArsTechnica, May 29, 2026)
The data reveals a disease that's far from just a rash, with about 20 percent of people–mostly younger children–being hospitalized. (...) Only six of the 54 hospitalized patients had an underlying medical condition that may have put them at higher risk. None of the 54 hospitalized patients were immunocompromised.
Of the 54 hospitalized, 47 (87 percent) developed a complication of measles, including 39 (72 percent) who developed pneumonia, 25 (46 percent) had dehydration, and 21 (39 percent) developed diarrhea. Seventeen (31.5 percent) developed co-infections with other pathogens, a known risk with measles, and 28 (52 percent) were treated with antibiotics.
Thirty-eight (70.4 percent) patients required supplemental oxygen to breathe.
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theprestige said:
Wait, we're calling 0.0006% of the population an epidemic?
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I don't know what we call it. The OP called it an epidemic, but most articles about it calls it an outbreak.
If you do a word search, epidemic occurred only once on this page before your post, which doubled it.
Now it's five times.
Outbreak occurred 20 times before this post, #95. Now it's 22 times.
I don't think what we call it affects the transmission of the measles virus in the USA at all.
 
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US nears 2,000 measles cases as scientists note brain inflammation, pneumonia in hospital cases (CIDRAP, May 29, 2026)
Of this year’s cases, 21% involve children younger than 5 years, and 72% involve kids and young adults up to 19 years. Among all 2026 patients, 92% have been unvaccinated or have an unknown vaccination status. Six percent of patients this year have been hospitalized, compared with 11% last year.
No measles deaths have been reported this year, compared with three last year.
Cases in Utah appear to be slowing
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Measles is still spreading in the U.S., with more than 2,000 cases this year (NBC News, June 5, 2026)
Measles cases in the U.S. reached 2,030 on Friday, the Centers for Disease Control and Prevention reported. That’s just a few hundred shy of the 2,288 logged in all of 2025, a record-breaking year that saw more measles diagnoses than any year since 1991.
There have been 30 new outbreaks this year, compared to 48 last year, the CDC said. The majority of cases are children and teenagers. More than 92% are unvaccinated and 6% (127 of the 2,030 patients) have been hospitalized.
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