Key points
Among the 2,214 cases of acute hepatitis B reported during 2023, at least one risk behavior or exposure during the 6 weeks to 6 months before illness onset was reported for 475 (21%) cases. No risk behavior/exposure was reported for 678 (31%) cases, and these data were missing for 1,061 (48%) cases.
Availability of information on risk behaviors or exposures* associated with reported cases† of acute hepatitis B — United States, 2023
Source: CDC, National Notifiable Diseases Surveillance System.
* Case reports with at least one of the following risk behaviors/exposures reported 6 weeks to 6 months prior to symptom onset or documented seroconversion if asymptomatic: 1) injection drug use; 2) multiple sexual partners; 3) underwent surgery; 4) men who have sex with men; 5) sexual contact with suspected/confirmed hepatitis B case; 6) sustained a percutaneous injury; 7) household contact with suspected/confirmed hepatitis B case; 8) occupational exposure to blood; 9) dialysis; and 10) transfusion. Reported cases may include more than one risk behavior/exposure.
† Reported confirmed cases. For the case definition, see .
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About Division of Viral Hepatitis