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 D. Caused by hepatitis delta agent which is considered a subviral satellite as it can only propagate in the presence of the Hepatitis B virus. Hepatitis D, sometimes called hep D or HDV, is a liver disease caused by the hepatitis D virus (HDV), a defective virus that needs the hepatitis B virus to exist.he hepatitis B virus is transmitted in the blood and body fluids of someone who is infected the same way the human immunodeficiency virus (HIV), the virus that causes AIDS, spreads. Yet hepatitis B is nearly 100 times as infectious as HIV.