International standardization and classification of human papillomavirus types

The rate of HPV type discovery is increasing, probably because of metagenomic sequencing. γ-genus today contains 79 HPV types and 27 species, surpassing ∝ and β genera with 65 and 51 HPV types, respectively. Regular issuing of proficiency panels based on HPV reference clones has resulted in global improvement of HPV genotyping services.