The BCG vaccine can be seen by looking at the spots and the tuberculin test to see if the vaccination has been successful.
1. Card spots: after BCG vaccination, the inoculation site will be red and swollen, sometimes with pus. Generally, scabs will be formed three months after vaccination, and after the scabs fall off, spots will be formed, and the appearance of spots indicates that the vaccination is successful.
2. Tuberculin test: if the spot can not see whether the inoculation is successful, you can judge by tuberculin test. Tuberculin test is the skin test on the lower palm side of the forearm of the inoculated patient. If the result is positive, it means that the vaccination is successful, and negative means that the exposure is not successful.
The BCG vaccine is effective in preventing Mycobacterium tuberculosis infection, and parents must pay attention to it, and if the vaccination is not successful, they should consult and deal with it in a designated institution such as an epidemic prevention center.