Hepatitis B Infection Specialist Doctor in Mumbai It is estimated that approximately two billion people worldwide have evidence of past or present infection with hepatitis B virus ( HBV ), and near 300 million individuals are chronic carriers of HBV. It is transmitted from patients who are infected to those who are not immune. The different modes of transmission are mother – to – child transmission, unprotected sexual intercourse and injection drug use. The spectrum of clinical manifestations of HBV infection varies in both acute and chronic disease. During the acute phase, manifestations range from almost no jaundice to severe jaundice and in some cases, fulminant involvement of liver. During the chronic phase, manifestations range from an asymptomatic carrier state to cirrhosis, and even cancer of liver. Whenever HBV is suspected or diagnosed, a specialist’s guidance must be sought immediately. The best way to prevent HBV infection is vaccination against HBV. These vaccines are widely available across our country. Each individual should consider immunization, as a method of protection against HBV. The advice from a specialist in this regard is paramount.