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About BCG Vaccinations

Last update date April 1, 2023

What is Tuberculosis?

It is caused by infection with Mycobacterium tuberculosis. In Japan, about 18,000 patients still occur every year, so it is not uncommon for adults to transmit children. In addition, newborn babies may suffer from tuberculosis because the resistance (immunity) to tuberculosis cannot be obtained by mothers. If you are infected with tuberculosis, tuberculous meningitis, etc., which may leave severe sequelae.
When you reach the age of 5 months, get BCG vaccination as soon as possible.
If you have a tuberculosis patient around you and suspect infection, consult your ward office Health Promotion Section before receiving the vaccination.

How to Vaccinations

BCG inoculation method is called the tube needle method, and it is stamped on two places on the upper arm by stamping method.
The inoculation site should be dried in the shade for about 10 minutes.

[Standard Schedule]
Once between 5 months and less than 8 months

[Age available free of charge]
0 months or older and less than 1 year old (until the day before the 1st birthday)

Side reaction of vaccine

About 10 days after inoculation, red spots are formed at the inoculation site, and small pus may be formed in some parts. This reaction becomes strongest about 4 weeks after inoculation, but then scabs form and only remains after inoculation by about 3 months after inoculation. This is not an abnormal reaction, but evidence that BCG vaccination has made it more resistant (immunity).
As it heals naturally, do not bandages or stick with bangs, and keep it clean.
However, please consult your doctor if you feel sick after the vaccination after more than 3 months.
In addition, the lymph nodes beneath the inoculated side may rarely swell. Normally, it can be cured if you look as it is, but if you swollen, suppurate and spontaneously tearing and spontaneously, or if the inoculation site is loose, contact the inoculated medical institution.
In rare cases, serious side effects include shock, anaphylaxis, systemic disseminated BCG infection, osteoneitis, myelitis, osteitis, osteitis, and skin nodules.

About Koch phenomenon

If your child is infected with M. tuberculosis before vaccination, BCG will cause redness, swelling, and suppuration at the inoculation site will occur within 10 days after inoculation, usually faded after 2 to 4 weeks. , Scarring and healing reactions may occur.
This is called the "Koch phenomenon".
If your child has a reaction that seems to be this "Koch phenomenon", please contact the medical institution where you vaccinated or your ward office Health Promotion Section.

For inquiries to this page

Yokohama Vaccinations Call Center

Phone: 045ー330-8561

Phone: 045ー330-8561

Fax: 045ー664ー7296

Email address: ir-yobousessyu@city.yokohama.jp

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Page ID: 402-275-056

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