Part 1 of Essay
HBV is a mostly double-stranded DNA virus in the Hepadnaviridae family. HBV causes hepatitis in human and related virus in this family cause hepatitis in ducks, ground squirrels and woodchucks. The HBV genome has four genes: pol, env, pre-core and X that respectively encode the viral DNA-polymerase, envelope protein, pre-c ....

Part 2 of Essay
.... 50% of adults infected with hepatitis B ever show any symptoms, with symptoms occurring even less often in infants and children. Some people do become very sick after they have been infected with HBV. Symptoms may include: · Jaundice (yellowing of the skin and eyes) · Dark-colored urine · Light-colored bowel movements · Flu-like feelings - poor appetite, fatigue, weakness, nausea, or vomiting · Fever, headache, or aching joints · Skin rash or itchiness · Pain in the upper right abdomen · Intoleran ....