If the vaccination series is interrupted does the series need to be restarted?

For all ages, when the HepB schedule is interrupted, the vaccine series does not need to be restarted. If the Heplisav-B series is interrupted, the second (final) dose should be given as soon as possible. For Engerix-B, Recombivax HB, and PreHevbrio, if the series is interrupted after the first dose, the second dose should be administered as soon as possible, and the second and third doses should be separated by at least 8 weeks. If only the third dose has been delayed, it should be administered as soon as possible.