What are the principles of BCG booster vaccination?

Vaccines are a very important medicine in modern life and play a critical role in preventing diseases. Therefore, vaccination is also a basic requirement for modern disease prevention. There are many types of vaccines, and people choose the appropriate vaccine according to their needs. Among them, BCG vaccine is the most commonly used one, but there are many injection principles that need to be paid attention to. Let’s take a look at the principles of BCG booster vaccination. I hope parents can understand this.

The national immunization program requires that newborns should be vaccinated with BCG within 24 hours. If the vaccination cannot be done within 24 hours due to infection, jaundice or other reasons, a BCG booster vaccination is required within 3 months. Suspension and ulcers may occur at the BCG vaccination site, and the ulcers will heal and scab over about 8-12 weeks. This is normal. If the baby is more than three months old, a negative PPD test is required before the BCG vaccination. Babies over 4 years old do not need to receive a BCG booster vaccination.

What are the principles of BCG booster vaccination?

1. If the BCG vaccination is not given in time due to health reasons at birth, the infant or child is required to wait 42 days after birth to be examined in a second-level or above hospital. When the infant or child has fully recovered to normal, the vaccination can be carried out with a health examination certificate (all indicators are normal) and the BCG booster vaccination instructions. The physical examination requires at least weight, heart and lung conditions and jaundice value (skin jaundice <8umol/L).

2. If BCG needs to be administered on the same day as other vaccines, a maximum of 2 injectable vaccines (including BCG) and one oral vaccine can be administered each time. Because BCG is only administered in the left upper arm, a one-month interval is required if administered in the left upper arm. BCG can be administered at different sites on the same day as a live attenuated vaccine. If not administered on the same day, the interval should be ≥ 28 days. The interval with hepatitis B immunoglobulin should be 1 month, and the interval with other immunoglobulins should be 3 months.

3. If the baby is older than 3 months but younger than 3 years old and has not been vaccinated, a PPD test is required, and vaccination can only be done if the result is negative.

4. If your baby is sick, you should wait one month after the acute illness recovers before getting a booster shot.

5. Children older than 4 years old do not need to receive booster vaccinations.