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.
1 Hepatitis B core antibody (HBcAb) is an antibody to the hepatitis B core antigen that appears about 1 month after the start of an active HBV infection. 2  It can be found in people who had an infection in the past and in those with long-term (chronic) HBV.3  It usually is present for life. Blood banks test for this antibody when screening donated blood for hepatitis B. 2  Hepatitis B core antibody IgM (HBcAbIgM) is another antibody to the hepatitis B core antigen. 3  It indicates an HBV infection that has occurred within the last 6 months.