Recipient of AlloSCT from related or unrelated donor.
Adults (men and women) ≥18 years up to and including 45 years of age for vaccination.
Patients can be included regardless of prior HPV vaccination prior to transplantation
You may not be if
Severe thrombocytopenia (under 50 x 10\^9) not allowing intramuscular injection
Severe acute GvHD grade III-IV.
Extensive chronic GvHD requiring treatment with prednisone doses above 0.7 mg/kg/day plus at least two other systemic treatments against GvHD (for example ruxolitinib or photopheresis).
Prednisone doses above 1mg/kg/day at study start.
Treatment with rituximab 6 months before start of vaccination. Doses given later (unusual) do not require exclusion.
Treatment within 3 months before start of vaccination with iv or sc immunoglobulin.
Pregnancy, pregnancy desire or active pregnancy planning during time vaccine is given and up to three months after last vaccine dose.
Treatment with blood thinning medication contraindicating intramuscular injection