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Epidemiology of hepatitis C
1Hepatitis Branch, Division of Viral and Rickettsial Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
Hepatology (Baltimore, Md.)
|September 26, 1997
Summary
Hepatitis C virus (HCV) infections have decreased, but 3.9 million Americans remain infected. Continued vigilance is crucial for preventing transmission and managing chronic liver disease risks.
Area of Science:
- Epidemiology
- Virology
Background:
- Acute hepatitis C virus (HCV) infections in the U.S. decreased significantly from the mid-1980s to 1995.
- An estimated 3.9 million Americans have HCV antibodies, with 1.8% prevalence in the general population.
Framework:
- HCV affects all ages, with young adults experiencing the most acute cases and highest prevalence.
- While whites represent the largest proportion of infections, non-white racial/ethnic groups exhibit higher incidence and prevalence rates.
Implementation:
- Historically, blood transfusions were a major HCV transmission route.
- Currently, high-risk drug use and sexual contact are the primary modes of HCV transmission.
Implications:
- Despite incidence decline, a substantial reservoir of chronically infected individuals poses ongoing transmission risks.
- Chronic HCV infection leads to an estimated 8,000-10,000 annual deaths from liver disease, highlighting the need for continued public health efforts.