noun, plural elegies. 1. a mournful, melancholy, or plaintive poem, especially a funeral song or a lament for the dead. 2. a poem written in elegiac meter. 3. a sad or mournful musical composition. Origin of elegy.
Hepatitis D virus (HDV) is an RNA virus that is structurally unrelated to hepatitis A (HAV), hepatitis B (HBV), or hepatitis C virus (HCV). It was discovered in 1977. HDV causes a unique infection that requires the assistance of viral particles from HBV to replicate and infect other hepatocytes.Its clinical course is varied and ranges from acute, self-limited infection to acute, fulminant liver failure.
Karl Landsteiner and Erwin Popper discovered poliovirus in 1908 by proving that it was not a bacterium that caused the paralysis, but a much smaller entityâa virus.arl Landsteiner and Erwin Popper discovered poliovirus in 1908 by proving that it was not a bacterium that caused the paralysis, but a much smaller entityâa virus.