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. 2023 Nov 3;72(4):1–21. doi: 10.15585/mmwr.rr7204a1

FIGURE 1.

Figure is a line graph illustrating rates of reported acute hepatitis C virus infection, by age group, in the United States during 2006–2021.

Rates* of laboratory confirmed acute hepatitis C virus infection, by age group — United States, 2006–2021§,¶

Source: National Notifiable Diseases Surveillance System, CDC.

* Rates per 100,000 population.

Reported confirmed cases. For the case definition, see https://ndc.services.cdc.gov/conditions/hepatitis-c-acute/.

§ The number of viral hepatitis cases reported to CDC in 2020 and 2021 might be lower than in years before the COVID-19 pandemic began. The decrease might be related to fewer people seeking health care and being tested for viral hepatitis during the COVID-19 pandemic.

Changes in case definitions should be considered when examining temporal trends. For more information regarding the case definitions used in 2021, see https://www.cdc.gov/nndss/index.html.