Transmission routes are similar to those for HIV, and the virus is spread through blood and body fluids such as semen, vaginal secretions and saliva. The virus can be contracted via inadequately-sterilised syringes and needles, tattooing, body piercing, poor surgical technique, or unprotected sex with an infected person. If untreated, it can lead to life-long infection, scarring of the liver, liver cancer and liver failure.
The incubation period for Hepatitis B is between three and six months. After suspected infection with the virus, several outcomes are possible: nothing may happen; you may develop the disease, recover and have life-long immunity; or you may develop the disease and become a carrier without having shown any symptoms.
Hepatitis B infection can go unnoticed or it may begin with 'flu-like symptoms, followed by:
Rest in bed lessens damage to the liver. A light diet with no fats and no alcohol needs to be followed for many months, to allow the liver to recover. Approximately 1%-3% of identified Hepatitis B cases lead to liver failure.
The high-risk places for travellers are: China, South-East Asia, Africa, the Pacific Islands, Haiti, the Dominican Republic, the Middle East, the Amazon region.
Babies born to mothers infected with Hepatitis B are at high risk of contracting Hepatitis. These babies have a 90% risk of chronic infection. Screening pregnant women for Hepatitis B antigen will identify the babies at risk. If the mother tests negative it is highly unlikely that the child will be affected.
In the UK, high risk groups for Hepatitis B include (ref BNF):
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