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About Hepatitis B Vaccinations

Final update date March 31, 2021

What is hepatitis B?

When infected with hepatitis B virus, it may become acute hepatitis and recover as it is, or it may become chronic hepatitis.
Some fulminal hepatitis can lead to death from severe symptoms.
In addition, the virus lurks in the liver without being revealed as a symptom, and over the years it has become chronic hepatitis, cirrhosis, liver cancer, etc.
It may be. The lower the age, the milder or less clearer the symptoms of acute hepatitis.
It is known that it is easy to take the form of a persistent infection in which the virus lurks as it is.
Infections include newborns born of hepatitis virus (HBs antigen)-positive mothers, and direct contact with hepatitis virus-positive blood and body fluids.
In some cases, it is caused by sexual contact with a hepatitis virus-positive person.


Vaccinations of hepatitis B is inoculated twice (typically 2 months and 3 months after birth) at intervals of 27 days or more.
In addition, we inoculate once (*) once (typically 7 to 8 months after birth) at intervals of 139 days or more from the first inoculation.
※If a child is born from a HBsAg-positive pregnant woman and has been vaccinated with hepatitis B vaccine to prevent mother-to-child transmission,
It is not eligible for routine immunization. Please continue to be vaccinated by employee health insurance continue to apply the vaccination.

[Standard Schedule] (The standard vaccination age is 2 months after birth, 3 months after birth, 7-8 months after birth)

First and second: After inoculation of the first, we inoculate the second at intervals more than 27 days.

Third: The third dose is given at least 139 days after the first vaccination (*).

[Free age]
0 months old or older and under 1 year old (until the day before the 1st birthday)

side reaction of vaccine

Side reactions include redness (redness), swelling (swelling), induration (lumps), pain, fever, malaise, and malaise at the site of inoculation.
I have a headache.
Very rarely, severe side effects include anaphylaxis and acute sporadic encephalomyelitis (ADEM).

Inquiries to this page

Yokohama Vaccinations Call Center

Telephone: 045-330-8561

Telephone: 045-330-8561

Fax: 045-664-7296

Email address: [email protected]

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