INCUBATION PERIOD: Unclear as it can vary from one month to several years, but it is usually 3 weeks to 8 months, and most warts develop 2 - 3 months after infection () ; however, most cases of infections will never show any symptoms () .NCUBATION PERIOD: Unclear as it can vary from one month to several years, but it is usually 3 weeks to 8 months, and most warts develop 2 - 3 months after infection () ; however, most cases of infections will never show any symptoms () .