TY - JOUR T1 - Response to Berlaimont and Welby JF - Sexually Transmitted Infections JO - Sex Transm Infect SP - 553 LP - 553 DO - 10.1136/sextrans-2019-054148 VL - 95 IS - 7 AU - Marta Checchi AU - David Mesher AU - Hamish Mohammed AU - Kate Soldan Y1 - 2019/11/01 UR - http://sti.bmj.com/content/95/7/553.abstract N2 - Berlaimont and Welby have queried why our recent publication (Checchi et al )1 reporting the declining trend in genital warts (GW) diagnoses in young people attending specialist sexual health services in England does not consider cross-protection of the bivalent human papillomavirus (HPV) vaccine against GW as a contributing explanation.In a previous analysis of data to 2014 (Canvin et al), we concluded that the observed trends in young people from 2009 to 2014 were strongly in keeping with a modest cross-protective effect, and associated herd-protection, from the bivalent vaccine.2 Since then, evidence has not amassed to support that hypothesis. Most notably, data from our surveillance of … ER -