A 5 year old boy is detected to be HBsAg positive on two separate occasions during a screening program for hepatitis B.He is otherwise asymptomatic.Child was given three doses of recombinant hepatitis B vaccine at the age of 1 year.His mother was treated for chronic hepatitis B infection around the same time.The next relevant for further investigating the child would be to

• A. Obtain anti HBs levels
• B. Obtain HBeAg and anti-HBe levels
• C. Repeat another course of hepatitis B vaccine
• D. Repeat HBsAg