CDC: reveals 1,955 arboviral disease cases reported in 48 states, D.C., in 2024
A total of 1,955 arboviral disease cases were reported by 48 states and the District of Columbia in 2024, 92% of which were caused by West Nile virus (WNV), according to research published in the U.S. Centers for Disease Control and Prevention Morbidity and Mortality Weekly Report.
In 2024, the U.S. Centers for Disease Control and Prevention (CDC) reported a total of 1,955 arboviral disease cases across 48 states and the District of Columbia, according to research published in the Morbidity and Mortality Weekly Report. Of these cases, 92% were attributed to West Nile virus (WNV), with 189 deaths reported (10% of total cases). The study, conducted by researchers including Kimberly E. Mace from the CDC in Atlanta, analyzed nationally notifiable domestic arboviral diseases with illness onset in 2024.
WNV was the most commonly reported arboviral disease, causing 1,808 cases (92%), although this number was below the 10-year median of 2,162 cases. Powassan virus disease accounted for 60 cases (3%), an increase from the high of 49 cases reported in 2023. The majority of arboviral disease patients were 60 or older, male, and had illness onset between July and September (58% onset in July, 63% in September, and 82% in both months combined).
La Crosse virus disease was reported almost exclusively in children younger than 18 (35 of 37 cases).
The authors emphasize the importance of high-quality and timely surveillance to understand the epidemiology, seasonality, and geographic distribution of domestic arboviruses. This information can aid in clinical recognition, outbreak identification, public messaging, and vector control activities.
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