Hepatitis B is caused by the hepatitis B virus. It can lead to a liver infection.
HBV is transmitted by coming into contact with bodily fluids during sex, childbirth, etc. Sharing injection needles can also transmit the virus.
Acute or chronic hepatitis B infection can occur. The former is just a short-term infection. The recovery can happen within a few weeks or months without going for therapy.
Small number of those with acute hepatitis B develop chronic hepatitis B, a long-term infection that usually lasts for six months. Liver failure, liver cancer and liver damage can occur in those diagnosed with chronic hepatitis B.
The presence of HBsAg in the blood denotes that you have been infected with the virus and can transmit it to others as well.