A large study from Australia has demonstrated a significant reduction in genital warts following introduction of the quadrivalent HPV vaccination programme in mid-2007. Eight sexual health services provided retrospective data from 2004 to 2011. Data were collected on demographics, sexual behaviour and diagnosis of genital warts; two large clinics also collected self-reported HPV vaccination status of new patients from 2009. The number of patients diagnosed with new genital warts was presented as a proportion of new patients seen. The proportion of Australian born patients who tested positive for chlamydia was used as a comparison.