Question
The baby was found to have hepatitis B antibodies during the one-month-old physical examination, but due to the parents not informing, the immunoglobulin was not administered at the sixth month. Now, at four months and one year old, will the baby still have hepatitis B antibodies?
Answer
Generally, the effectiveness of the hepatitis B vaccine lasts for 5 to 10 years. Please check if the child has received all three doses of the vaccine. If you are concerned about losing immunity, you can retest the hepatitis B panel.