The vaccination schedule depends on the age at which the first dose is administered. For individuals starting the series before their 15th birthday, a two-dose schedule is recommended, with the second dose given 6 to 12 months after the first. For those starting on or after their 15th birthday, a three-dose schedule is advised, with the second dose given 1 to 2 months after the first, and the third dose 6 months after the first.
