How old does the child need to be to accurately check for the hepatitis B surface antigen and antibodies?

Patient's question:

Patient Age: Half-year-old The child is only half a year old. Since his father previously tested positive for type 1 and type 5, and I have antibodies, we haven't paid much attention to it in our daily lives. After the child was born, we did get vaccinated, but we don't know if it produced antibodies. Now, I want to have the child checked, but I'm wondering if it's possible to check at his age? When should I have him checked? What should I pay attention to in daily life?

Doctor's answer:

Hello, the hepatitis B two pairs of half test has no age limit, and it can be done by taking a small amount of blood. Suggestions: Children like your baby can already do it. Generally, two doses of hepatitis B vaccine are enough to produce antibodies, and the third dose is just a booster. Contact us if you have any questions. Best regards.

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