If somebody does nothing it might require a few years to establish immunity to HPV virus. If somebody follows the author's suggestions, it takes just a couple of months to create immunity to human papilloma virus. The longer somebody is infected with human papilloma virus, the longer it could trigger damage. So it is ideal to create resistance and get rid of HPV as quickly as reasonable.
https://andreixag.bloggersdelight.dk/2020/05/08/an-introduction-to-how-do-you-become-infected-with-hpv/