Clinical Context
Hepatitis B is a viral infection that can lead to chronic liver disease, cirrhosis, and hepatocellular carcinoma. The virus is transmitted through contact with infectious blood and body fluids. Despite the availability of effective vaccines since 1982, vaccination coverage among adults has been suboptimal, particularly in those aged 19 to 59 years. The previous risk factor-based vaccination approach limited access for many individuals who could benefit from vaccination. The updated CDC guidelines now recommend universal vaccination for all adults aged 19 to 59 years, regardless of risk factors, which is expected to increase vaccination rates and ultimately decrease the incidence of hepatitis B infections.