The World Health Organization marked World Hepatitis Day on 28 July with new figures showing that the vast majority of people living with viral hepatitis remain undiagnosed and untreated, despite the availability of effective medicines and vaccines. WHO estimates that only 13% of the world’s hepatitis B patients had been diagnosed by the end of 2022 and just 3% had received treatment. For hepatitis C, diagnosis stood at 36% and curative treatment at 20%. More than 300 million people globally are living with chronic hepatitis B or C, infections that can silently progress to severe liver disease and cancer. WHO Director-General Tedros Adhanom Ghebreyesus warned that acting now could prevent 2.8 million deaths over the next five years. Under the 2025 campaign theme “Hepatitis: Let’s Break it Down,” the agency called on governments to integrate hepatitis testing, vaccination and therapy into primary health systems to stay on track for the 2030 global elimination targets.