Study Maps US States Most Vulnerable to Flu

Machine learning analysis identifies 11 jurisdictions—including the District of Columbia, Massachusetts, and Hawaii—with the highest vulnerability to influenza-like illness.

By
Kathryn Wighton
March 10, 2026
3 min

Conexiant

Overview

A recent study identified the District of Columbia as the most vulnerable jurisdiction to influenza-like illness (ILI) in the U.S. using a machine learning-based vulnerability index. The analysis highlighted significant socio-economic factors contributing to state-level susceptibility to ILI during 2022.

Background

Understanding the vulnerability of different regions to influenza-like illness is crucial for public health planning and response. Socio-economic conditions can greatly influence health outcomes, making it essential to identify areas at higher risk. This study provides valuable insights that can inform targeted interventions and resource allocation.

Data Highlights

State	Vulnerability Category
District of Columbia	Very High
Massachusetts	Very High
Hawaii	Very High
New Mexico	Very High
Rhode Island	Very High
Connecticut	Very High
Maryland	Very High
Oregon	Very High
Washington	Very High
Michigan	Very High
Arizona	Very High

Key Findings

The District of Columbia was identified as the most vulnerable jurisdiction to ILI.
Eleven jurisdictions were classified as having very high vulnerability to ILI.
Key socio-economic indicators included lack of health insurance, population density, and the percentage of residents aged 65 years or older.
Counterintuitive relationships were observed, such as higher uninsured rates correlating with lower reported infection rates.
Different factors influenced vulnerability across jurisdictions, highlighting the need for tailored public health measures.

Clinical Implications

Healthcare providers should be aware of the socio-economic factors that contribute to influenza vulnerability in their regions. Targeted vaccination campaigns and improved healthcare access are essential in high-vulnerability areas to mitigate the impact of influenza-like illness.

Conclusion

The study underscores the importance of socio-economic factors in assessing vulnerability to influenza-like illness, emphasizing the need for tailored public health strategies to address these disparities.