Hepatitis B is a viral infection that mainly affects the liver. The effects of Hepatitis B can be significant and lead to both short- and long-term liver disease. The severity of the infection can range from a mild illness to a chronic condition that significantly impacts the liver’s ability to function and causes overall ill-health. It is transmitted by exposure to infected body fluids and international travellers are warned to take preventive measures, including Hepatitis B vaccination, to minimize the risks associated with Hepatitis B.