What is co-infection?
Some people who have Hepatitis B are also infected with hepatitis C (HCV), or HIV. Co-infection with these viruses can cause liver disease to progress much faster and for liver damage to be more severe and treatment less effective. People infected with Hepatitis B can also be co-infected with Hepatitis D.
Hepatitis D is also passed on in blood and is most common in injecting drug users. The Hepatitis D virus needs the Hepatitis B virus to survive, so it is only possible to contract Hepatitis D if you have Hepatitis B. Again this can cause liver damage to progress faster and liver damage to be more severe and treatment less effective. If you have been diagnosed with Hepatitis B, talk to your health professional about whether you have been tested for Hepatitis D.