World Hepatitis Day, observed July 28, aims to raise global awareness of hepatitis B and hepatitis C and encourage prevention, diagnosis, and treatment. It has been led by the World Hepatitis Alliance since 2007 and in May 2010, it received global endorsement from the World Health Organization.
Medical Definition of joule. : a unit of work or energy equal to the work done by a force of one newton acting through a distance of one meter.
It is a measure of power. A joule is a measure of energy. To calculate power consumed by an electrical device for a specified amount of time you multiply the power by the time. You rarely if ever see things represented in watts per unit time. See more: at this wikipedia link.