(delta) is an 'incomplete' virus and can’t function on its own. A person cannot
be infected with hepatitis D on its own, only as a co-infection
with hepatitis B. The addition of hepatitis D can make chronic hepatitis B
significantly worse and increases the risk of cirrhosis and liver cancer.
Hepatitis D is the most dangerous known hepatitis virus.
and D co-infection is relatively uncommon in western and central Europe with
the exception of Italy.
Migrants from South America, Africa, the Middle East and Eastern
Europe, or people who contract hepatitis B in these regions, are
more likely to have been exposed to hepatitis D.
D is mainly transmitted through blood-to-blood contact.