scholarly journals Modeling the consequences of regional heterogeneity in human papillomavirus (HPV) vaccination uptake on transmission in Switzerland

2017 ◽  
Author(s):  
Maurane Riesen ◽  
Victor Garcia ◽  
Nicola Low ◽  
Christian L. Althaus
Keyword(s):  
Human Papillomavirus ◽  
Vaccination Coverage ◽  
Hpv Vaccination ◽  
Population Based ◽  
Regional Heterogeneity ◽  
Hpv 16 ◽  
Vaccination Programs ◽  
Vaccination Uptake ◽  
Hpv Prevalence ◽  
Time Period

AbstractBackgroundCompleted human papillomavirus (HPV) vaccination by age 16 years among women in Switzerland ranges from 17 to 75% across 26 cantons. The consequences of regional heterogeneity in vaccination coverage on transmission and prevalence of HPV-16 are unclear.MethodsWe developed a deterministic, population-based model that describes HPV-16 transmission among young adults within and between the 26 cantons of Switzerland. We parameterized the model using sexual behavior data from Switzerland and data from the Swiss National Vaccination Coverage Survey. First, we investigated the general consequences of heterogeneity in vaccination uptake between two sub-populations. We then compared the predicted prevalence of HPV-16 after the introduction of heterogeneous HPV vaccination uptake in all of Switzerland with homogeneous vaccination at an uptake that is identical to the national average (52%).ResultsHPV-16 prevalence in women is 3.34% when vaccination is introduced and begins to diverge across cantons, ranging from 0.14 to 1.09% after 15 years of vaccination. After the same time period, overall prevalence of HPV-16 in Switzerland is only marginally higher (0.55 %) with heterogeneous vaccination uptake than with homogeneous uptake (0.49%). Assuming inter-cantonal sexual mixing, cantons with low vaccination uptake benefit from a reduction in prevalence at the expense of cantons with high vaccination uptake.ConclusionsRegional variations in uptake diminish the overall effect of vaccination on HPV-16 prevalence in Switzerland, although the effect size is small. Cantonal efforts towards HPV-prevalence reduction by increasing vaccination uptake are impaired by cantons with low vaccination uptake. Harmonization of cantonal vaccination programs would reduce inter-cantonal differences in HPV-16 prevalence.

scholarly journals Population Impact of Girls-Only Human Papillomavirus 16/18 Vaccination in The Netherlands: Cross-Protective and Second-Order Herd Effects

2020 ◽  
Author(s):  
Joske Hoes ◽  
Petra J Woestenberg ◽  
Johannes A Bogaards ◽  
Audrey J King ◽  
Hester E de Melker ◽  
...  
Keyword(s):  
Human Papillomavirus ◽  
The Netherlands ◽  
Hpv Vaccination ◽  
Population Level ◽  
Second Order ◽  
Vaccine Uptake ◽  
Heterosexual Men ◽  
Hpv 16 ◽  
Vaccination Programs ◽  
Hpv Types

Abstract Background Human papillomavirus (HPV) vaccination programs achieve substantial population-level impact, with effects extending beyond protection of vaccinated individuals. We assessed trends in HPV prevalence up to 8 years postvaccination among men and women in the Netherlands, where bivalent HPV vaccination, targeting HPV types 16/18, has been offered to (pre)adolescent girls since 2009 with moderate vaccination coverage. Methods We used data from the PASSYON study, a survey initiated in 2009 (prevaccination) and repeated biennially among 16- to 24-year-old visitors of sexual health centers. We studied genital HPV positivity from 2009 to 2017 among women, heterosexual men, and unvaccinated women using Poisson generalized estimating equation models, adjusted for individual- and population-level confounders. Trends were studied for 25 HPV types detected by the SPF10-LiPA25 platform. Results A total of 6354 women (64.7% self-reported unvaccinated) and 2414 heterosexual men were included. Percentual declines in vaccine types HPV-16/18 were observed for all women (12.6% per year [95% confidence interval {CI}, 10.6–14.5]), heterosexual men (13.0% per year [95% CI, 8.3–17.5]), and unvaccinated women (5.4% per year [95% CI, 2.9–7.8]). We observed significant declines in HPV-31 (all women and heterosexual men), HPV-45 (all women), and in all high-risk HPV types pooled (all women and heterosexual men). Significant increases were observed for HPV-56 (all women) and HPV-52 (unvaccinated women). Conclusions Our results provide evidence for first-order herd effects among heterosexual men against HPV-16/18 and cross-protective types. Additionally, we show second-order herd effects against vaccine types among unvaccinated women. These results are promising regarding population-level and clinical impact of girls-only bivalent HPV vaccination in a country with moderate vaccine uptake.

scholarly journals Human papillomavirus seroprevalence in pregnant women following gender-neutral and girls-only vaccination programs in Finland: A cross-sectional cohort analysis following a cluster randomized trial

PLoS Medicine ◽  
2021 ◽  
Vol 18 (6) ◽  
pp. e1003588
Author(s):  
Penelope Gray ◽  
Hanna Kann ◽  
Ville N. Pimenoff ◽  
Tiina Eriksson ◽  
Tapio Luostarinen ◽  
...  
Keyword(s):  
Human Papillomavirus ◽  
Randomized Trial ◽  
Vaccination Coverage ◽  
Hpv Vaccination ◽  
Herd Effect ◽  
Entire Study ◽  
Post Vaccination ◽  
Vaccination Programs ◽  
Link Type ◽  
Gender Neutral

Background Cervical cancer elimination through human papillomavirus (HPV) vaccination programs requires the attainment of herd effect. Due to its uniquely high basic reproduction number, the vaccination coverage required to achieve herd effect against HPV type 16 exceeds what is attainable in most populations. We have compared how gender-neutral and girls-only vaccination strategies create herd effect against HPV16 under moderate vaccination coverage achieved in a population-based, community-randomized trial. Methods and findings In 2007–2010, the 1992–1995 birth cohorts of 33 Finnish communities were randomized to receive gender-neutral HPV vaccination (Arm A), girls-only HPV vaccination (Arm B), or no HPV vaccination (Arm C) (11 communities per trial arm). HPV16/18/31/33/35/45 seroprevalence differences between the pre-vaccination era (2005–2010) and post-vaccination era (2011–2016) were compared between all 8,022 unvaccinated women <23 years old and resident in the 33 communities during 2005–2016 (2,657, 2,691, and 2,674 in Arms A, B, and C, respectively). Post- versus pre-vaccination-era HPV seroprevalence ratios (PRs) were compared by arm. Possible outcome misclassification was quantified via probabilistic bias analysis. An HPV16 and HPV18 seroprevalence reduction was observed post-vaccination in the gender-neutral vaccination arm in the entire study population (PR16 = 0.64, 95% CI 0.10–0.85; PR18 = 0.72, 95% CI 0.22–0.96) and for HPV16 also in the herpes simplex virus type 2 seropositive core group (PR16 = 0.64, 95% CI 0.50–0.81). Observed reductions in HPV31/33/35/45 seroprevalence (PR31/33/35/45 = 0.88, 95% CI 0.81–0.97) were replicated in Arm C (PR31/33/35/45 = 0.79, 95% CI 0.69–0.90). Conclusions In this study we only observed herd effect against HPV16/18 after gender-neutral vaccination with moderate vaccination coverage. With only moderate vaccination coverage, a gender-neutral vaccination strategy can facilitate the control of even HPV16. Our findings may have limited transportability to other vaccination coverage levels. Trial registration ClinicalTrials.gov number NCT00534638, https://clinicaltrials.gov/ct2/show/NCT00534638.

scholarly journals Evolution of Public Health Human Papillomavirus Immunization Programs in Canada

2021 ◽  
Vol 28 (1) ◽  
pp. 991-1007
Author(s):  
Alexandra Goyette ◽  
Glorian P. Yen ◽  
Voica Racovitan ◽  
Parambir Bhangu ◽  
Smita Kothari ◽  
...  
Keyword(s):  
Public Health ◽  
Human Papillomavirus ◽  
Vaccination Coverage ◽  
Prince Edward Island ◽  
Hpv Vaccination ◽  
Hpv Infection ◽  
After School ◽  
Vaccination Programs ◽  
School Based ◽  
Coverage Rates

Background: Since 2007, all Canadian provinces and territories have had a publicly funded program for vaccination against human papillomavirus (HPV) infection. The objective of this study was to describe the evolution of these vaccination programs. Methods: This was a targeted literature review of public HPV vaccination programs and vaccination coverage rates, based on information provided by jurisdictional public health authorities. Results: HPV vaccination of schoolgirls began in school years 2007/08 to 2010/11 with three doses of the quadrivalent HPV vaccine in all provinces except Quebec, which started with two doses. By 2018/19, all jurisdictions were vaccinating with two doses of the nonavalent vaccine in both girls and boys, except Quebec, which used a mixed vaccination schedule with one dose of the nonavalent and one dose of the bivalent vaccines. Public HPV vaccination programs in most provinces include after-school catch-up vaccination. Immunocompromised or other high-risk individuals are eligible for the HPV public vaccination program in most provinces, but policies vary by jurisdiction. In 2017/18, vaccination coverage rates in provincial HPV school-based programs varied from 62% in Ontario to 86% in Prince Edward Island in girls and from 58% in Ontario to 86% in Prince Edward Island in boys. Conclusions: Since their introduction, Canadian school-based HPV public vaccination programs have evolved from a three-dose to a two-dose schedule, from a quadrivalent to a nonavalent vaccine, and from a girls-only to a gender-neutral policy. Vaccination coverage rates have varied markedly and only Prince Edward Island and Newfoundland/Labrador have maintained rates exceeding 80%.

scholarly journals Acquisition, prevalence and clearance of type-specific human papillomavirus infections in young sexually active Indian women: A community-based multicentric cohort study

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0244242
Author(s):  
Richard Muwonge ◽  
Partha Basu ◽  
Tarik Gheit ◽  
Devasena Anantharaman ◽  
Yogesh Verma ◽  
...  
Keyword(s):  
Human Papillomavirus ◽  
Hpv Vaccination ◽  
Hpv Infection ◽  
Sample Collection ◽  
Community Based ◽  
Hpv 16 ◽  
Indian Women ◽  
Cervical Sample ◽  
Hpv Prevalence ◽  
Hpv Types

In context of the ongoing multi-centric HPV vaccine study in India, unvaccinated married women (N = 1484) aged 18–23 years were recruited in 2012–2015 as age-matched controls to the vaccinated women and followed up yearly. We assess type-specific prevalence, natural history and potential determinants of human papillomavirus (HPV) infection in these unvaccinated women. Cervical samples were collected yearly for at least four consecutive years. A Multiplex Type-Specific E7-Based polymerase chain reaction assay was used to detect 21 HPV types. HPV prevalence was 36.4% during 6 years. Most common HPV types were 16 (6.5%) and 31 (6.1%). Highest persistence were observed for HPV 35 (62.5%) and 52 (25%). New HPV acquisition rate was 5.6/1000 person-months of observation (PMO), highest for HPV 16 (1.1/1000 PMO). Type-specific clearance rates ranged between 2.9–5.5/100 PMO. HPV 16 and/or 18 infections were 41% (95% CI 4–63%) lower among women with 2-<3 years between marriage and first cervical sample collection compared to those with <2 years. HPV prevalence and acquisition rates in young Indian women were lower than their Western counterparts. HPV 16 infections being most common shows the importance and potential impact of HPV vaccination in India. Women with 2–3 years exposure had reduced risk possibly due to higher infections clearance.

scholarly journals Low vaccination coverage for human papillomavirus disease among young men who have sex with men, France, 2019

2021 ◽  
Vol 26 (50) ◽  
Author(s):  
Giuseppina Ortu ◽  
Anne-Sophie Barret ◽  
Kostas Danis ◽  
Lucie Duchesne ◽  
Daniel Levy-Bruhl ◽  
...  
Keyword(s):  
Human Papillomavirus ◽  
Vaccination Coverage ◽  
Rural Areas ◽  
Hpv Vaccine ◽  
Online Survey ◽  
Vaccine Coverage ◽  
Hpv Vaccination ◽  
Cross Sectional ◽  
Vaccination Uptake ◽  
Sex With Men

Background In France, human papillomavirus (HPV) vaccination has been recommended in 2016 for men who have sex with men (MSM) up to age 26 years. Aim We aimed to estimate HPV vaccine coverage in 18–28 year-old MSM and identify uptake determinants. Methods We collected data on socio-demographic characteristics, sexual behaviour, sexually transmitted diseases (STI) screening and vaccination uptake using a voluntary cross-sectional online survey conducted in 2019 targeting MSM. We calculated coverage of at least one dose of HPV vaccine and prevalence ratios (PR) of determinants with 95% confidence intervals (CI) using Poisson regression. Results Of 9,469 respondents (age range: 18–28 years), 15% (95% CI: 14–16) reported being vaccinated for HPV. Coverage was significantly higher among MSM < 24 years (PR: 1.25; 95% CI: 1.13–1.39), with education level below university degree (PR: 1.12; 95% CI: 1.08–1.32), living in rural areas (PR: 1.21; 95% CI: 1.08–1.36), attending sex parties (PR: 1.12; 95% CI: 1.03–1.33), using HIV-related biomedical prevention methods (PR: 1.31; 95% CI: 1.12–1.54), with STI diagnosis (PR: 1.22; 95% CI: 1.08–1.38) and with hepatitis A or B vaccination (PR: 4.56; 95% CI: 3.63–5.81 vs PR: 3.35; 95% CI: 2.53–4.44). Conclusions The HPV vaccination uptake among MSM in France was not satisfactory. It was higher among MSM benefitting from other vaccinations and biomedical preventive methods against HIV, suggesting a synergistic effect of the national preventive sexual health recommendations for MSM. Further efforts to improve HPV vaccination coverage targeting MSM are warranted.

scholarly journals Modeling the consequences of regional heterogeneity in human papillomavirus (HPV) vaccination uptake on transmission in Switzerland

Vaccine ◽  
2017 ◽  
Vol 35 (52) ◽  
pp. 7312-7321 ◽  
Author(s):  
Maurane Riesen ◽  
Victor Garcia ◽  
Nicola Low ◽  
Christian L. Althaus
Keyword(s):  
Human Papillomavirus ◽  
Hpv Vaccination ◽  
Regional Heterogeneity ◽  
Vaccination Uptake

Socioeconomic disadvantage and human papillomavirus (HPV) vaccination uptake

Vaccine ◽  
2021 ◽  
Author(s):  
Shaheen Kurani ◽  
Kathy L. MacLaughlin ◽  
Robert M. Jacobson ◽  
Jennifer L. St. Sauver ◽  
Gregory D. Jenkins ◽  
...  
Keyword(s):  
Human Papillomavirus ◽  
Hpv Vaccination ◽  
Socioeconomic Disadvantage ◽  
Vaccination Uptake

Prevalence of human papillomavirus by geographical regions, sexual orientation and HIV status in China: a systematic review and meta-analysis

2018 ◽  
Vol 94 (6) ◽  
pp. 434-442 ◽  
Author(s):  
Xiaomeng Ma ◽  
Qian Wang ◽  
Jason J Ong ◽  
Christopher K Fairley ◽  
Shu Su ◽  
...  
Keyword(s):  
Systematic Review ◽  
Cervical Cancer ◽  
Human Papillomavirus ◽  
Meta Analysis ◽  
Hpv Vaccination ◽  
Hpv Infection ◽  
Central China ◽  
Hiv Positive ◽  
Heterosexual Men ◽  
Hpv Prevalence

ObjectiveHuman papillomavirus (HPV) infection causes multiple cancers in both women and men. In China, both HPV vaccination and cervical cancer screening coverages are low. We aim to investigate the temporal and geographical trends of HPV DNA prevalence in heterosexual men, women, men who have sex with men (MSM) and people living with HIV (PLHIV) in China.MethodsWe conducted a systematic review, collecting publications in PubMed, Web of Science, China National Knowledge Infrastructure (CNKI) and Wanfang Data from January 2000 to May 2017. A total of 247 studies were selected for this meta-analysis to estimate pooled HPV prevalence, incidence of cervical cancer and risk of infection for subgroups. Meta-regression was applied to identify contributing factors to prevalence heterogeneities.ResultsThe national HPV prevalence was 15.6% (95% CI (14.4% to 16.9%)) in women with normal cervical cytology, and Central China had the highest prevalence (20.5% (15.2% to 25.8%)). HPV prevalence in heterosexual men (14.5% (11.3% to 17.7%)) was comparable with that of women (OR=1.09 (0.98 to 1.17)), but HPV prevalence in MSM (59.9% (52.2% to 67.6%)) was significantly higher than that in heterosexual men (OR=8.81 (8.01 to 9.69)). HIV-positive women (45.0% (38.4% to 51.6%)) and HIV-positive MSM (87.5% (82.3% to 90.9%)) had 4.67 (3.61 to 6.03) and 6.46 (5.20 to 8.02) times higher risk of HPV infection than their HIV negative counterparts.ConclusionHPV infection is prevalent in China, particularly in Central China, in comparison with the global level and neighbouring countries. Targeted HPV vaccination for women, MSM and PLHIV and scale-up of cervical screening for women are priorities in curbing the HPV epidemic in China.

scholarly journals Exploring variation in human papillomavirus vaccination uptake in Switzerland: a multilevel spatial analysis of a national vaccination coverage survey

BMJ Open ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. e021006 ◽  
Author(s):  
Maurane Riesen ◽  
Garyfallos Konstantinoudis ◽  
Phung Lang ◽  
Nicola Low ◽  
Christoph Hatz ◽  
...  
Keyword(s):  
Human Papillomavirus ◽  
Spatial Analysis ◽  
Vaccination Coverage ◽  
Human Papillomavirus Vaccination ◽  
Vaccination Uptake

scholarly journals Human papillomavirus vaccination coverage among working women

2021 ◽  
Vol 6 (4) ◽  
pp. 714-722
Author(s):  
Sajeda Khatun ◽  
Ashees Kumar Saha ◽  
Irtiza Ahmed Chowdhury ◽  
Arifa Sultana ◽  
Mst Wazeda Begum ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
Human Papillomavirus ◽  
Vaccination Coverage ◽  
Hpv Vaccination ◽  
Working Women ◽  
Hpv Infection ◽  
Cross Sectional Study ◽  
P Value ◽  
Human Papillomavirus Vaccination ◽  
Cross Sectional

Human papillomavirus (HPV) infection is one of the causes of cervical cancer which is preventable. The study was a cross-sectional study with the objective was to determine the Human papillomavirus (HPV) vaccination coverage among working women. A total 236 educated working women were selected purposively from different working places in Dhaka city. A pretested semi- structured questionnaire was used for data collection. The knowledge was assessed by using modified Blooms cut off points which was developed with cervical cancer and vaccine knowledge related questions. The study result revealed that among 236 working women 71.2% knew about the risk factor of cervical cancer. It was found that 92.8% knew about the way of prevention of cervical cancer respectively. The overall knowledge on cervical cancer and vaccine was found to be having good knowledge 21.2%, satisfactory knowledge 41.9% and poor knowledge 36.9%. Out of the total working women only 5.1% had HPV vaccination coverage. Reason behind non vaccinations, 50% mentioned had no knowledge about vaccine, 35.3% mentioned can’t decide and 8.9% mentioned high cost of vaccine. Significant association has been observed in between vaccination coverage with over all knowledge of cervical cancer (p value .04). It may be concluded that HPV vaccination coverage is very low which needs awareness program on this issues through mass media, educational session, counseling and so on to reduce human papillomavirus associated cancers as well as economic burden. Asian J. Med. Biol. Res. December 2020, 6(4): 714-722

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