
Explanation of vaccination B.C.G BCG（結核） Illness to prevent Tuberculosis Although tuberculosis was a very common illness in Japan in the past, today the number of cases has significantly decreased. However, quite a few new cases still appear yearly, and some are spread from adults to children. Because newborns can not get immunity from their mothers, TB infection may not only hurt young children’s lungs but also cause disseminated tuberculosis, tubercular meningitis, and serious sequelae. Type of Vaccine Live attenuated vaccine Routine Vaccination (age and frequency) 3 to under 6 months, 1 shot Normal reaction to B.C.G. vaccine About 10 days after the vaccination, small red spots appear at the injection sites and gradually grow in size. Such a reaction reaches its peak about 1 to 2 months after the injection and even causes pus at the injection sites, which will heal by forming a scar around 3 to 4 months after the injection. Side Effects 3 months later, there is still pus at the injection sites or the healed sites develop pus again. Swollen lymph nodes in armpit can be seen in 1 to 3 months and will naturally disappear in 2 to 3 months after the injection. Minimum interval between vaccinations over 27 days Precautions Generally, the reaction occurs about 10 days later, but some may occur within 10 days or even in 1, 2 days after the injection. There is red swelling or pus at the injection sites, which will heal in 2 to 4 weeks. This is called “Koch’s phenomenon”. Though this process is not harmful, it is recommended to consult a doctor for a check-up as soon as possible.

Explanation of vaccination

B.C.G BCG（結核）

Illness to prevent

Tuberculosis
Although tuberculosis was a very common illness in Japan in the past, today the number of cases has significantly decreased.
However, quite a few new cases still appear yearly, and some are spread from adults to children. Because newborns can not get immunity from their mothers, TB infection may not only hurt young children’s lungs but also cause disseminated tuberculosis, tubercular meningitis, and serious sequelae.

Type of Vaccine

Live attenuated vaccine

Routine Vaccination (age and frequency)

3 to under 6 months, 1 shot

Normal reaction to B.C.G. vaccine

About 10 days after the vaccination, small red spots appear at the injection sites and gradually grow in size.
Such a reaction reaches its peak about 1 to 2 months after the injection and even causes pus at the injection sites, which will heal by forming a scar around 3 to 4 months after the injection.

Side Effects

3 months later, there is still pus at the injection sites or the healed sites develop pus again.
Swollen lymph nodes in armpit can be seen in 1 to 3 months and will naturally disappear in 2 to 3 months after the injection.

Minimum interval between vaccinations

over 27 days

Precautions

Generally, the reaction occurs about 10 days later, but some may occur within 10 days or even in 1, 2 days after the injection.
There is red swelling or pus at the injection sites, which will heal in 2 to 4 weeks. This is called “Koch’s phenomenon”. Though this process is not harmful, it is recommended to consult a doctor for a check-up as soon as possible.