Cos’è l’epatite B
hepatitis B is a viral infection that affects the liver. Is transmitted through blood of an infected person or with sexual relationships; può also be transmitted from the mother to the newborn baby.
The infection può do not give symptoms, or may cause an acute hepatitis b is deadly in approximately 1% of cases.
Furthermore infection can; persist over time and cause chronic hepatitis, which canò evolve into cirrhosis and liver cancer.
The frequency of chronic hepatitis is 90% if the child contracts the infection before birth or during birth, 20-40 for infections in children and about 10% for infections in adults.
there is No specific therapy against Hepatitis B.
è frequent hepatitis B in Italy?
Before the introduction of vaccination, Italy was one of the european countries most affected by hepatitis B, and was reported about 3,500 cases each year.
The surveillance data indicate that in the last decade, the incidence of the disease is greatly reduced, with 1.059 cases reported in 2004.
Thanks to vaccination, the number of cases is decreased markedly, especially in children up to 14 years, where it is passed from 356 cases in 1987 to 19 cases in 2004 (-95%).
What the vaccine is used against hepatitis B?
this Is a vaccine costuituito from a single protein of hepatitis B virus (HBV). Currently available vaccines monovalent only against the hepatitis B vaccine combined with other antigens.
For the vaccination in the first year of life are used especially vaccines esavalenti. Since 1991, the vaccination is compulsory in Italy for all infants. Is administered by intramuscular injection in the teé doses in the first year of life in 3°, 5° 11°-13° month of età. the
What are the risks of the vaccination?
The vaccination rarely causes fever or local reactions that resolve spontaneously. The severe allergic reactions (anafìlassi) are very rare.
In such cases, the vaccination could notò be done?
The vaccination should be postponed in case of acute illness is important.
In the case of a severe allergic reaction (anaphylaxis) to a vaccine, subsequent doses should not be performed.
in Addition, vaccination is contraindicated in case of severe allergic reaction to a component of the vaccine.
the Municipality of Rome – Department for Policies for the Promotion of the Child and the Family – Department XVI
Hepatitis A, B, and C. Symptoms, diagnosis, and treatment
Page updated on 31/5/2006