Ventricular Septal Defect Causes No one knows what causes ventricular septal defects, but they probably come from a malformation of the heart that occurs while the infant is developing in the womb. There may be just one hole or several holes in the septum.
Definition. Hepatitis B is a potentially serious form of liver inflammation due to infection by the hepatitis B virus (HBV). It occurs in both rapidly developing (acute) and long-lasting (chronic) forms, and is one of the most common chronic infectious diseases worldwide. Contact with infected blood is a common means of transmitting hepatitis B. 2  One way this may happen is by being stuck with a needle. 3  Both health care workers and those who inject drugs into their veins are at risk in this way. 4  Having sex with a person infected by HBV is an important risk factor (especially anal sex).
What is Hepatitis B. Hepatitis B is a virus that can cause liver cancer and can be prevented through a vaccine. Hepatitis B can cause short-term (acute) or long-term (chronic) infection in the liver.Chronic infection can lead to scarring of the liver, also known as cirrhosis, or can lead to liver cancer.Approximately 1.25 million people in the United States have chronic hepatitis B infection.he presence of these antibodies can tell your doctor or healthcare provider if you have been exposed to hepatitis B, if you have a chronic infection, or if you have previously received the hepatitis B vaccine.