WORLDWIDE CONTACT US ABOUT US INVENTING FOR LIFE PRODUCTS RESEARCH LICENSING NEWSROOM CAREERS INVESTORS Home HEPATITIS C A Silent Disease and Growing Concern Globally, an estimated 170 million people are living with chronic hepatitis C infection. Most don't know it. Chronic hepatitis C is a serious liver disease caused by the hepatitis C virus (HCV) that over time, can cause liver damage and cirrhosis (scarring of the liver). One of the challenges of managing hepatitis C is that people with HCV often have no symptoms -- and can live with an infection for decades without feeling sick. HEPATITIS C BASICS Hepatitis C is a contagious liver disease that ranges in severity from a mild illness lasting a few weeks to a serious, lifelong illness that attacks the liver. It results from infection with HCV, which is spread primarily through contact with the blood of an infected person. Hepatitis C can be either "acute" or "chronic." Acute HCV infection is a short-term illness that occurs within the first 6 months of exposure to HCV. For most people, acute infection leads to chronic infection. Chronic HCV infection is a long-term illness that occurs when HCV remains in a person's body. HCV infection can lead to serious liver problems, including cirrhosis (scarring of the liver) or liver cancer. Before 1992, when widespread screening of the blood supply began in the U.S., hepatitis C was also commonly spread through blood transfusions and organ transplants. Today, most people in the U.S. become infected with HCV by sharing needles or other equipment to inject drugs. Decades can pass between the time of acquiring HCV infection and the development of HCV-related liver disease such as cirrhosis. (Source: CDC and WHO) WHY THE LIVER MATTERS Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons. You can take care of your liver by: Eating a healthy diet and exercising Limiting the amount of alcohol you drink Avoiding breathing in or touching toxins from cleaning and aerosol products, insecticides, chemicals and additives in cigarettes APPROXIMATELY 3.5 MILLION ADULTS IN THE U.S. HAVE CHRONIC HCV INFECTION. MORE THAN 75 PERCENT OF THEM ARE PEOPLE BORN FROM 1945 TO 1965. 3.5 MILLION adults in the U.S. 75% are people born from 1945 to 1965. The prevalence of cirrhosis in people living with chronic HCV infection is expected to increase over the next 10 years. This growing burden of HCV on individuals, communities and healthcare systems has pushed the global scientific community to find ways to fight chronic HCV infection. ADVANCES IN FIGHTING CHRONIC HEPATITIS C INFECTION The hepatitis C virus was first identified in 1989. Many people in the U.S. were infected through blood transfusions and organ donations before HCV testing in blood banks was established in 1992. Dr. Eliav Barr, senior vice president, global clinical development, infectious diseases and vaccines, Merck Research Laboratories “People got infected and usually didn't know it because the acute infection is typically asymptomatic,” said Dr. Eliav Barr, senior vice president, global clinical development, infectious diseases and vaccines, Merck Research Laboratories. “After prolonged infection, 20-25 years or so, people were presenting with advanced liver damage. A huge cohort of baby boomers got infected, didn't know it, are gradually getting diagnosed and finding their disease is advancing. This is an ongoing problem.” Over the past 25 years, step by step, the world's scientific community has increased its understanding of the virus - and that breakthrough science continues. HEPATITIS C: KNOW THE FACTS VIEW INFOGRAPHIC HEP C RESOURCES The American Liver Foundation: HepC123 CDC: Know More Hepatitis Copyright. © 2009-2017 Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc. All rights reserved. Forward-Looking Statement Privacy Terms of Use Site Map