Which is the suitable time or schedule for having hepatitis b booster dose(vaccine)?

Which age?: Hep b infant schedule w/ 3 doses given at birth, 1-2 months, ; 3rd dose between 6-18 months for adolescents ages 11-15 there is an alternative 2 dose series given 4-6 months apart adult dose: day 1, one month, ; 3rd dose at 6 months for those adults needing rapid coverage, an accelerated series can be given day 1, day 7, day 21 w/ booster at 12 months. Also a combo hepatitis a/ hep b available.