Patient's question:
The child is 3 months old. They received the BCG vaccine on September 27th. It's fine to bathe the child over the weekend, but today when bathing the child, I noticed a pustule or something on the left arm where the vaccine was administered. Is this an adverse reaction to the BCG vaccine? Can the incubation period for adverse reactions to the BCG vaccine be this long?Doctor's answer:
According to your description, looking at the picture, this is a normal reaction to the BCG vaccine. There is no need to worry, and do not break it. Inflammation of the BCG vaccine is a normal reaction to vaccination. Generally, after receiving the BCG vaccine, those with a strong natural immunity may experience mild inflammation at the vaccination site again. Therefore, inflammation of the BCG vaccine is a normal phenomenon. If there is no inflammation, it may mean the vaccination was not successful, and another vaccination is required. A successful vaccination will result in inflammation forming a BCG scar.