In 2023, 48 states and the District of Columbia reported 2,770 human arboviral illness instances, with West Nile Virus (WNV) being the commonest, in keeping with analysis revealed within the June 12 challenge of the U.S. Facilities for Illness Management and Prevention Morbidity and Mortality Weekly Report.
Hannah Padda, D.V.M., from the CDC in Atlanta, and colleagues summarized 2023 information for nationally notifiable home arboviral illnesses.
The researchers discovered 2,770 human arboviral illness instances, together with 2,022 hospitalizations and 208 deaths (73% and eight%, respectively) reported by 48 states and the District of Columbia.
In 2023, as in earlier years, essentially the most generally reported home arboviral illness was WNV, accounting for two,628 (95%) of all reported instances. Of the case onsets, 91% occurred from July to September. In 2023, three WNV illness instances occurred amongst sufferers contaminated by means of organ transplantation from two donors.
The second commonest arboviral illness reported was Powassan virus illness (49 instances), which elevated from the earlier document excessive in 2022; onsets have been evenly distributed throughout April to December. Amongst youngsters, the La Crosse virus was the commonest explanation for arboviral illness; most instances have been labeled as neuroinvasive.
“Arboviral disease testing should be considered by clinicians for patients with an acute febrile or neurologic illness, including recipients of organ transplants or blood transfusions, particularly during times when ticks and mosquitoes are active,” the authors write.
Extra data:
Hannah Padda et al, West Nile Virus and Different Nationally Notifiable Arboviral Ailments — United States, 2023, MMWR. Morbidity and Mortality Weekly Report (2025). DOI: 10.15585/mmwr.mm7421a1
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2,770 instances of arboviral illness reported in 48 states and D.C. in 2023 (2025, June 17)
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