The National Health Service (NHS) is the publicly funded healthcare system for the United Kingdom. It is the largest and the oldest single-payer healthcare system in the world. Primarily funded through the general taxation system and overseen by the Department of Health, the system provides healthcare to every legal resident in the United Kingdom, with most services free at the point of use. Some services, such as emergency treatment and treatment of infectious diseases are free for everyone, including visitors. VivaChek is officially listed on Drugs Tariff NHS (UK), which means VivaChek blood glucose meters and test strips are allowed to be distributed freely within NHS system in the UK.