Hepatitis B is a viral infection caused by the Hepatitis B virus (HBV) that primarily targets the liver. It can lead to both acute and chronic disease, with chronic infection being a significant global health problem, particularly prevalent in parts of Asia and Africa. Untreated chronic Hepatitis B can cause severe liver damage, including cirrhosis and liver cancer.
Transmission methods vary. Please consult CDC or WHO resources for specific information.
Contagious Period: Varies by disease
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Data sources: BEACON, ProMED, WHO, CDC, and 50+ national health agencies
Our AI-powered surveillance hasn't detected significant Hepatitis B activity in the past 30 days.
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Currently, Hepatitis B case counts are within baseline expectations globally. However, diseases can emerge rapidly, which is why continuous monitoring is critical.
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Even without active outbreaks, understanding Hepatitis B prevention helps protect you and your community:
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Trusted information from leading health organizations
Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-03-05
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