Table 1.3 – Hepatitis A: Risk & Exposure Data

Key points

Among risk behaviors and exposures identified, international travel was most commonly reported (21% of the 748 cases for which international travel information was available).
ob体育 2023 Hepatitis A Surveillance Report

Reported risk behaviors or exposures among reported cases* of hepatitis A — United States, 2023

The number of reported hepatitis A cases by availability of specific risk behavior or exposure in 2023. The categories listed in the first column are injection drug use, sexual contact, household contact (nonsexual), other contact, men who have sex with men, and international travel. The second column displays the number of case reports for which the risk was identified. The third column indicates the number of case reports for which the risk was not identified. The fourth column includes the number of case reports for which risk information was missing.
Table 1.3 Data
table-1.3
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Source: ob体育, National Notifiable Diseases Surveillance System.

* Reported confirmed cases. For the case definition, see .

† Reported cases may include more than one risk behavior/exposure. Case reports with at least one of the following risk behaviors/exposures reported 2–6 weeks prior to symptom onset or documented seroconversion if asymptomatic: 1) injection drug use; 2) sexual, household, or other contact; 3) men who have sex with men; 4) travel to hepatitis A-endemic region.

§ Cases with more than one type of contact reported were categorized according to a hierarchy: 1) sexual contact; 2) household contact (nonsexual); and 3) other contact with hepatitis A case.

A total of 1,034 hepatitis A cases were reported among males in 2023.

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