Patient's question:
Mother has hepatitis B. How long after the baby is born can you check if he has hepatitis B? After birth, he received the hepatitis B vaccine and hepatitis B immune globulin.Doctor's answer:
You can check it after 6 months. The significance of testing after injection is not very great. As long as the blocking success rate is above 95%. If you want to check whether the hepatitis B vaccine has been successfully administered, it is recommended to check 20 days after completing the full course of the hepatitis B vaccine to see if it has been successfully administered. Due to individual differences, the chance of producing antibodies varies. After the first injection, only 18% of people produce antibodies in 2 weeks, and it can reach 41% one month later; after the second injection, 80-90% of recipients can produce antibodies. Six months after the third injection, 96% of people will have positive antibody conversion and it will remain unchanged for several years.