Πέμπτη 15 Φεβρουαρίου 2018

Potential lives saved in 73 countries by adopting multi-cohort vaccination of 9-14 year old girls against human papillomavirus

Abstract

Up to 2016, low- and middle-income countries mostly introduced routine human papillomavirus (HPV) vaccination for just a single age-cohort of girls each year. However, high income countries have reported large reductions in HPV prevalence following “catch-up” vaccination of multiple age-cohorts in the year of HPV vaccine introduction. We used the mathematical model PRIME to project the incremental impact of vaccinating 10-14-year old girls compared to routine HPV vaccination only in the same year that routine vaccination is expected to be introduced for 9-year old girls across 73 low and lower-middle income countries. Adding multiple age-cohort vaccination could increase the number of cervical cancer deaths averted by vaccine introductions in 2015-2030 by 30-40% or an additional 1.23-1.79 million over the lifetime of the vaccinated cohorts. The number of girls needed to vaccinate to prevent one death is 101 in the most pessimistic scenario, which is only slightly greater than that for routine vaccination of 9-year old girls (87). These results hold even when assuming that girls who have sexually debuted do not benefit from vaccination. Results suggest that multiple age-cohort vaccination of 9-14-year old girls could accelerate HPV vaccine impact and be cost-effective. This article is protected by copyright. All rights reserved.



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