US Measles Cases Double Last Year's Total as Pennsylvania Leads Outbreak

The CDC reports over 4,500 cases nationwide with three deaths, while Pennsylvania officials warn of rare congenital measles risks amid criticism of the agency's transparency.

6 publishers · 16 articles · first seen 16 Oct 2026 · updated 12d ago

Headline and summary written by an AI model from the linked articles; not reviewed by a person. How this was made

First reported by Al Jazeera – Breaking News, World News and Video from Al Jazeera, 3h 37m ahead of the next publisher · who breaks stories first

This story has stopped developing; this page is its permanent record. More from that day

The odds

How the odds moved · Above 6000

Each tick is a source publishing on this story · 5 more published before price tracking began

Price data

Time	Chance of yes
now	76%
27 Oct, 15:05 UTC	76%
26 Oct, 19:15 UTC	77%
26 Oct, 18:11 UTC	75%
26 Oct, 17:21 UTC	74%
26 Oct, 15:39 UTC	80%
26 Oct, 01:02 UTC	83%
25 Oct, 21:43 UTC	80%
25 Oct, 21:29 UTC	85%
22 Oct, 20:55 UTC	84%
22 Oct, 00:10 UTC	86%
21 Oct, 22:53 UTC	84%
21 Oct, 19:10 UTC	85%
21 Oct, 14:13 UTC	86%
20 Oct, 20:02 UTC	83%
20 Oct, 18:24 UTC	79%
20 Oct, 12:25 UTC	80%
20 Oct, 11:55 UTC	87%
19 Oct, 11:44 UTC	80%

The story so far

6 publishers have covered this in 16 articles since 16 Oct 2026. Al Jazeera – Breaking News, World News and Video from Al Jazeera published first, on 16 October at 17:40 UTC; The Hill followed 3h 38m later. The most recent article, from NPR Health, appeared on 25 October at 20:35 UTC.

Outlets reporting it: Al Jazeera – Breaking News, World News and Video from Al Jazeera (major outlet), The Hill (major outlet), The Guardian US (major outlet), Ars Technica (major outlet), NPR Health (major outlet), Latest articles.

One prediction market prices this story:

Above 6000 — the market puts it at 76%, with $320 traded in the last 24 hours, closing 1 Jan 2027. The market resolves to Yes if the total number of measles cases in 2026 exceeds 6000. It resolves to No if that total is 6000 or fewer. Readers often mistake the current case count for the final annual total, but only the full year's data counts.

Odds are the market's probability that the outcome happens, updated every few minutes. They are information about what traders expect, not a forecast we make and not investment advice.

How it unfolded

Every source in the order it published, with the odds on Above 6000 at that moment. A dash means the source published before we started tracking prices.

16 Oct, 17:40Al Jazeera – Breaking News, World News and Video from Al Jazeera US records 4,410 measles cases as outbreak grows—
16 Oct, 21:18The Hill US measles cases exceed 4,400, far exceeding last year's totals—
17 Oct, 12:00The Guardian CDC to send ‘disease detective’ to help tackle Pennsylvania measles outbreak—
18 Oct, 01:46The Hill CDC sends a 'disease detective' to Pennsylvania amid measles outbreak—
18 Oct, 16:00Just In News Infectious disease veterans call for clearer federal message on measles—
19 Oct, 22:44Ars Technica Pennsylvania issues alert on congenital measles—something US hasn't seen for decades80%
20 Oct, 11:00Latest articles Bangladesh battle against measles a ‘real warning’ to other nations80%
20 Oct, 17:58Al Jazeera – Breaking News, World News and Video from Al Jazeera CDC reports third measles death in the United States this year80%
20 Oct, 18:18The Hill CDC recognizes third measles death, still short of Pennsylvania count80%
21 Oct, 14:55The Hill Pennsylvania warns doctors about rising rates of rare congenital measles86%▲6 points since the previous source
Show 6 later sources
1. 21 Oct, 23:01The Hill Pennsylvania warns of congenital measles risk as cases rise84%▼2 points since the previous source
2. 22 Oct, 10:00The Guardian Experts alarmed by ‘less transparent’ CDC as US measles deaths rise86%▲2 points since the previous source
3. 22 Oct, 21:02Al Jazeera – Breaking News, World News and Video from Al Jazeera Why measles outbreak in Pennsylvania poses risks beyond US borders84%▼2 points since the previous source
4. 23 Oct, 22:45The Hill US officially doubles last year's measles numbers84%
5. 24 Oct, 12:00The Guardian US Additional 178 cases of measles reported by US health authorities amid outbreak84%
6. 25 Oct, 20:35NPR Health U.S. measles cases more than double what they were last year as outbreak spreads84%
NowCurrent odds76%

Sources

Every article we clustered into this story. Headlines link to the publisher.

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Kalshi Above 6000 76% −1 $320 24hends 1 Jan 2027
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In this story

CDC
Pennsylvania Department of Health
Robert F Kennedy Jr

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