Can the third dose of the infant hepatitis B vaccine be given at eight and a half months?

Patient's question:

Common cold

Doctor's answer:

Your situation involves a child receiving the hepatitis B vaccine, which is typically administered according to the 0, 1, 6 schedule. Currently, the child has a cold, and delaying the third dose is acceptable.
Medical advice: The first two doses of the 0, 1, 6 schedule can be administered as planned. The third dose, which serves as a booster, usually results in a positive surface antibody response after the first two doses for most people. After your child receives the third dose, you can check the two pairs of hemagglutination (HBsAg, anti-HBs, HBeAg, anti-HBe, anti-HBc) one month later. If the surface antibody (anti-HBs) is positive, it is sufficient. If it is negative, you can restart the 0, 1, 6 schedule. There is no need to worry.