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 virus (HBV) tests check for substances in the blood that show whether a hepatitis B infection is active or has occurred in the past. The tests look for different signs of infection (markers): 1  Antigens are markers made by bacteria or viruses.2  Antibodies are proteins produced by the body to fight infection. 3  Genetic material (DNA) of the hepatitis B virus shows that the virus is in the body.he tests look for different signs of infection (markers): 1  Antigens are markers made by bacteria or viruses. 2  Antibodies are proteins produced by the body to fight infection. 3  Genetic material (DNA) of the hepatitis B virus shows that the virus is in the body.