Hepatitis B is a viral infection caused by one's infection with the hepatitis virus B. Hepatitis B can launch the inflammation of an infected person's liver which can lead to liver failure, hepatic cirrhosis, liver cancer or even death.

Hepatitis B is an infectious disease caused by the virus of hepatitis B, a DNA virus whose natural host is human body. It is a known fact that this particular virus is very resistant to the conditions outside its host, which means this little living virus can survive outside its natural environment for a long time. They actually discovered it on the contaminated medical equipment, many months after the contamination, and this could be the transmission way, or at least one of them.