North America 23 Sep 2026 · Dr Natalya Mathur
ENCLAI ID ENCLAI-2026-0000430-0 · Cite

Q fever in the US: 97 cases in 90 days, 28 in the last 30

ENCLAI SURVEILLANCE BRIEFING · 23 SEPTEMBER 2026Q fever in the US: 97 cases in 90 days,28 in the last 30Q fever · The US · reported cases28reported cases in the 30 days to 23 September▲ 12% more than the 30 days before (25)25The 30 daysbefore60Same 30 days, ayear earlier9790 days to 23September2152026 so farThree 30-day windows60A year earlier2530 days before28Last 30 daysLargest counts, last 90 daysHong Kong837Australia102The US97South Korea27Hungary19The UK47 countries with a reported count in this windowWhat this briefing shows1Reported cases rose from 25 to 28 between the two latest 30-daywindows, 12% more.2The latest count of 28 is below the 60 reported in the same 30 daysa year earlier.3The US accounts for 4.1% of the q fever cases reported to ENCLAIworldwide in 2026 and ranks 3 of 10 reporting countries.Read with care: reports to official surveillance, not people and not a rate. A change between30-day windows can come from reporting timing as much as from transmission.Source: official surveillance reports compiled by ENCLAI · data as of 2026-09-23 ·enclai.net/newsVerify every figure against the source data before use; ENCLAI does not guarantee accuracy orcompleteness.
  1. Reported cases rose from 25 to 28 between the two latest 30-day windows, 12% more.
  2. The latest count of 28 is below the 60 reported in the same 30 days a year earlier.
  3. The US accounts for 4.1% of the q fever cases reported to ENCLAI worldwide in 2026 and ranks 3 of 10 reporting countries.
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Largest included reported counts (6 of 7 countries) · 2026-06-25 through 2026-09-23 · source-record dates; coverage varies
Hong Kong837
Australia102
United States97
South Korea27
Hungary19
United Kingdom4
Q fever — United States · reported surveillance count · 2026-06-25 through 2026-09-23 · inclusive source-record dates
Q fever — United States · reported surveillance count · 2026-08-24 through 2026-09-23 · inclusive source-record dates
Q fever — United States · reported surveillance count · 2026-07-24 through 2026-08-23 · inclusive source-record dates
Q fever — United States · reported surveillance count · 2025-08-24 through 2025-09-23 · inclusive source-record dates
Q fever · combined reported surveillance count · 2026-06-25 through 2026-09-23 · inclusive source-record dates
Q fever · weekly reported-count series · Weeks starting 2026-06-15 through 2026-08-31
Largest included reported counts (6 of 7 countries) · 2026-06-25 through 2026-09-23 · source-record dates; coverage varies

The full briefing

Full 2026 picture: Q fever in United States — reported cases by year, monthly records and every briefing for this pair.

The US reported 97 q fever cases in the 90 days to 23 September. 28 of them came in the 30 days to 23 September, against 25 in the 30 days before. The same 30 days a year earlier had 60.

Why it matters

The US accounts for 4.1% of the q fever cases reported to ENCLAI worldwide so far in 2026. It ranks 3 of 10 reporting countries.

The numbers

PeriodReported cases
Last 30 days (to 23 September)28
The 30 days before that25
Same 30 days a year earlier60
90 days to 23 September97
2026 so far (ENCLAI export)215
The card shows q fever in the US. It compares the last 30 days with the 30 days before, as reported to ENCLAI.
The card shows q fever in the US. It compares the last 30 days with the 30 days before, as reported to ENCLAI.

What the source says

These figures come from official surveillance reports. They count reports, not people. They are not an incidence rate, the rate of new cases in a population. They do not cover the whole population. The reporting periods do not match these dates exactly. Some reports are incomplete or still in progress. Some run past the window. Some reports do not say which date they use: symptom onset, notification, or confirmation.

Caveats

  • A change between two 30-day windows can come from reporting timing as much as from transmission. The source does not say which.

Where to learn more

Q fever in the US: the 2026 picture · Q fever worldwide · the US: all diseases · How to read these counts

Retained reporting context

Included reporting countries

Q fever

1,088

combined reported surveillance count

2026-06-25 through 2026-09-23 · inclusive source-record dates

For Q fever, the combined reported surveillance count across the 7 countries with positive reported counts in this selection is 1,088. The selection uses source-record dates 2026-06-25 through 2026-09-23, inclusive. This covers only these reporting countries; source periods and completeness vary.

Exact included country membership
CountryReported countSource-record dates
Australia1022026-06-25 through 2026-09-23
Germany22026-06-25 through 2026-09-23
United Kingdom42026-06-25 through 2026-09-23
Hong Kong8372026-06-25 through 2026-09-23
Hungary192026-06-25 through 2026-09-23
South Korea272026-06-25 through 2026-09-23
United States972026-06-25 through 2026-09-23

Snapshot 2026-09-23

Weekly reporting history

Q fever

weekly reported-count series

Weeks starting 2026-06-15 through 2026-08-31

A retained retrospective weekly reported-count series across included reporting countries. Country membership and reporting completeness can vary by week. Missing weeks remain gaps. This is a separate report-series measure; it does not establish exact incidence or laboratory confirmation.

Retained weekly report series
WeekReported count
2026-06-15 through 2026-06-2135
2026-06-22 through 2026-06-2811
2026-06-29 through 2026-07-0529
2026-07-06 through 2026-07-129
2026-07-13 through 2026-07-1941
2026-07-20 through 2026-07-263
2026-07-27 through 2026-08-0240
2026-08-03 through 2026-08-094
2026-08-10 through 2026-08-1634
2026-08-17 through 2026-08-233
2026-08-24 through 2026-08-309
2026-08-31 through 2026-09-0618

Snapshot 2026-09-22

Sources and limitations

  • Window. Each quantity keeps its recorded source-selection dates and coverage notes. Dated batches and weekly or genomic observations retain their separate measures. Publication or capture dates do not establish case onset, equal cohorts or period completeness.
  • Denominator. The retained counts do not establish complete populations, equal reporting cohorts or incidence rates. Source period bounds and definitions can differ.
  • Case definition. Case definitions are set nationally and change over time. Counts for the same disease in different countries may not be counting the same thing.
  • Revisions. Agencies restate figures. Values here are as reported at the time of publication; see the update history below.

ENCLAI counts reflect verified records available from reporting sources for the stated window. They are not estimates of total incidence and should not be interpreted as medical advice. Full methodology: the dataset.

Review and corrections

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