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Many a persons may develop low titers or undetectable titers even after full course of Hepatitis B vaccine
. Also, after 7-10 years, titers are usually very low. But this, usually doesnot reflect a state of non-immunity, as it is not directly related to exact levels of antibodies
. You may go for a booster, but I advice you to, please, discuss all this 1st with a Hepatologist [liver
specialist], or Gastroenterologist, & then take a fully informed decision. Wishing you best of health.
Dr NAVEEN KANSAL, MD [PGI, Chd]
Skin Clinic, SCO 298, Sect. 20, Panchkula.