“…Increased metaplastic activity in the cervix during adolescence and its decline after menopause implica earlier age at sexual debut as a risk factor for HPV infection. Other factors related to HPV infection or persistence include young age, the socioeconomic status, multiparity, male circumcision, condom use, oral contraceptive use, smoking, immune suppression, viral load, and certain genetic polymorphisms 26, 91, 73, 89, 34, 32, 71, 83, 86, 30 40, 62, 82, 69, 68, 11, 67, 35, 61 90, 72, 66, 54, 6, 84, 59, 43 44, 31, 42, 45, 74, 33, 81, 70 51, 58, 53, 56 52 18 16 in the human leukocyte antigen system (Moscicki et al, 2001;Palefsky et al, 2001;Maciag et al, 2002;Schlecht et al, 2002;Richardson et al, 2003;Winer et al, 2003;Baldwin et al, 2004;Baseman and Koutsky, 2005;Cotton et al, 2007;Goodman et al, 2008;Tobian et al, 2009;Tobian et al, 2010;Marks et al, 2011;Bahmanyar et al, 2012;Emeka et al, 2012;Liao et al, 2012;Repp et al, 2012;Schabath et al, 2012;Teixeira et al, 2012;Zhang et al, 2012).…”