Figure 1.7 – Hepatitis A: Risk & Exposure Data

At a glance

Among the 5,728 case reports of hepatitis A received by CDC for 2021, data regarding risk behaviors or exposures were missing for 1,841 (32%) cases.
CDC 2021 Hepatitis A Surveillance Report

Availability of information regarding risk behaviors or exposures* associated with reported cases of hepatitis A — United States, 2021

Figure 1.7
figure-1.7
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Source: CDC, National Notifiable Diseases Surveillance System.

* 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. Reported cases may include more than one risk behavior/exposure.

Summary

Among the 5,728 case reports of hepatitis A received by CDC for 2021, data regarding risk behaviors or exposures were missing for 1,841 (32%) cases. At least one risk behavior or exposure was reported for 1,818 (32%) cases during the 2–6 weeks before illness onset. More than one risk can be reported for each case. (See Table 1.3.)

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