Increase in Travel-Associated and Locally Acquired Dengue Cases — United States, 2024
Cited in 2 Likelier entries (2 risks, 0 decisions).
Used in 2 entries
For each citing entry, the verbatim excerpt and Likelier's calculation notes (how the source's number was converted to the lifetime-probability framing) are shown below. Click through to read the full claim ledger.
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- Statistic
3,798 dengue cases reported from the 50 US states and DC in 2024 (a 359% increase above the 2010-2023 annual average of 828); 3,693 (97.2%) travel-associated and 105 (2.8%) locally acquired; locally acquired cases reported only from Florida (85, across 10 counties), California (18, three counties), and Texas (2, two counties).
“"During 2024, a total of 3,798 dengue cases, including 2,252 (59.3%) confirmed and 1,546 (40.7%) probable cases, were reported to CDC from the 50 U.S. states and DC. Among these cases, 3,693 (97.2%) were travel associated, and 105 (2.8%) were locally acquired. … These represent a 359% increase above the annual average of 828 cases per year during 2010–2023. … Three jurisdictions reported locally acquired cases, including Florida (85 cases reported from 10 counties), California (18 from three counties), and Texas (two from two counties)."”
Calculation notes
This MMWR report is the granular 2024 US case tally that anchors the new locally-acquired (autochthonous) caveat. Of 3,798 cases reported from US states/DC in 2024, only 105 (2.8%) were locally acquired — the other 97.2% were travel-associated, i.e. the population this entry's headline already covers. The 105 local cases were confined to three states and a handful of counties (Florida 85/10 counties, California 18/3, Texas 2/2), so the per-resident base rate for catching dengue without leaving the continental US is far below the per-trip traveler figure and is sharply concentrated in Aedes-range counties along the Gulf and southern California. No per-resident denominator is published here and the count is volatile year to year, so the caveat characterizes this risk qualitatively rather than quoting a "1 in N US residents" rate.
Independence note: MMWR draws on the same CDC ArboNET surveillance pipeline as the Yellow Book source above — it is NOT an independent stream, just the granular 2024 jurisdiction-level case tally. Cited specifically for the locally-acquired vs travel-associated split, which the Yellow Book and WHO/GeoSentinel sources do not break out for the US.
Source date: 2026-05-14 · Accessed: 2026-06-14
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- Statistic
3,798 total US dengue cases in 2024 (+359% above the 2010–2023 average); 97.2% travel-associated, 2.8% locally acquired; continental US locally-acquired cases: Florida 85 (10 counties), California 18 (3 counties), Texas 2 (2 counties) = 105.
“During 2024, a record 3,798 dengue cases were reported [...] a 359% increase above the 2010–2023 annual average. Among these 3,798 cases, 97.2% were associated with travel outside the reporting jurisdiction during the 2 weeks preceding symptom onset; the remaining 2.8% were locally acquired. [...] Three jurisdictions reported locally acquired cases, including Florida (85 cases reported from 10 counties), California (18 from three counties), and Texas (two from two counties).”
Calculation notes
Locally-acquired continental total = 85+18+2 = 105. Annual rate = 105 / 338,000,000 continental residents = 3.1e-7/person-year. 59-year compounded = 1-(1-3.1e-7)^59 = 1.83e-5. This is the authoritative FINAL count; an earlier CDC HAN (March 2025) listed Florida as 91 preliminarily — the MMWR's 85 supersedes it.
Source date: 2026-05-14 · Accessed: 2026-06-13
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