Definition of elegy for English Language Learners. : a sad poem or song : a poem or song that expresses sorrow for someone who is dead.
Hepatitis B was first discovered in 1963 by Dr. Baruch Blumberg and colleagues, who identified a protein (the âAustralia antigenâ that reacted to antibodies from patients with hemophilia and leukemia.
Hepatitis B is an infectious liver disease. It is caused by the hepatitis B virus (HBV). Infections of hepatitis B occur only if the virus is able to enter the blood stream and reach the liver.