HPV vaccination: Are we overlooking additional opportunities to control HPV infection and transmission?

Human papillomavirus virus-like particles (HPV VLPs) have distinctive immunogenic properties that generate a durable antibody response, producing high-quality neutralizing antibodies. By vaccination, i.e., intramuscular injection of these HPV VLPs, the viral survival strategy of avoiding exposure to the systemic immune system is completely overruled, and large amounts of vaccine-induced systemic antibodies are generated. These systemic circulating antibodies are easily transuded to the genital mucosa and are detectable in female genital secretions. It is well accepted that these antibodies interact with the virions presented by an infected partner and inhibit infection. However, much less attention has been paid to the role of anti-HPV vaccine-induced antibodies in an HPV-infected individual where infectious virions are encountered by neutralizing antibodies in mucosal secretions. There is a clear need to further investigate and document this role. Indeed, if HPV vaccination of HPV-infected women has an effect on HPV transmission, auto-inoculation, and relapse after treatment, this may influence how we model, assess, and implement HPV vaccination programmes. (C) 2019 The Author(s). Published by Elsevier Ltd on behalf of International Society for Infectious Diseases

Prevention and control of HPV infection and HPV-related cancers in Colombia- a meeting report.

The Human Papillomavirus (HPV) Prevention and Control Board is an independent multidisciplinary board of international experts that disseminates relevant information on HPV to a broad array of stakeholders and provides guidance on strategic, technical and policy issues in the implementation of HPV control programs. In response to drastic drop of vaccine coverage following the adverse event crisis in Carmen del Bolivar, Colombia, the HPV Prevention and Control Board in collaboration with the Colombian National Cancer Institute and Colombian League Against Cancer convened a meeting in Bogota, Columbia (November 2018). The goal of the meeting was to bring together national and international group of experts to report the disease burden, epidemiology and surveillance of HPV and HPV-related cancers, to discuss the successes and especially the challenges of HPV vaccination and screening in Colombia, as well as the lessons learnt from neighbouring countries. The meeting provided a platform to confer various stakeholder's perspectives, including the role of the Colombian healthcare system and to catalyse various parts of the public health community in Colombia into effective action. The conclusion of the meeting included following suggestions to strengthen HPV prevention and control: 1) Re-introducing school-based vaccine programs, 2) Integrating primary and secondary prevention programs, 3) Developing an innovative crisis communication plan targeting healthcare workers, teachers and general population, 4) Building trust through efficient and timely communication, 5) Building strong relationship with media to ensure a stable vaccination campaign support, and 6) Promoting empathy among healthcare professionals towards patients to build trust and communicate effectively

Overcoming barriers in HPV vaccination and screening programs

The Human Papillomavirus Prevention and Control Board brought together experts to discuss optimizing HPV vaccination and screening programs. Board members reviewed the safety profile of licensed HPV vaccines based on clinical and post-marketing data, reaching a consensus that current safety data is reassuring. Successful vaccination programs used well-coordinated communication campaigns, integrating (social) media to spread awareness. Communication of evidence supporting vaccine effectiveness had beneficial effects on the perception of the vaccine. However, anti-vaccination campaigns have threatened existing programs in many countries. Measurement and monitoring of HPV vaccine confidence over time could help understand the nature and scale of waning confidence, define issues and intervene appropriately using context-specific evidence-based strategies. Finally, a broad group of stakeholders, such as teachers, health care providers and the media should also be provided with accurate information and training to help support prevention efforts through enhanced understanding of the risks and benefits of vaccination. Similarly, while cervical cancer screening through population-based programs is highly effective, barriers to screening exist: awareness in countries with population-based screening programs, access for vulnerable populations, and access and affordability in low-and middle-income countries. Integration of primary and secondary prevention has the potential to accelerate the decrease in cervical cancer incidence

Comparison between urine and cervical samples for HPV DNA detection and typing in young women in Colombia

Urine sampling for HPV DNA detection has been proposed as an effective method for monitoring the impact of HPV vaccination programs; however, conflicting results have been reported. The goal of this study was to evaluate the performance of optimized urine HPV DNA testing in women aged 19 to 25 years. Optimization process included the use of first void urine, immediate mixing of urine with DNA preservative, and the concentration of all HPV DNA, including cell-free DNA fragments. Urine and cervical samples were collected from 535 young women attending cervical screening at health centers from two Colombian cities. HPV DNA detection and genotyping was performed using an HPV type-specific multiplex genotyping assay, which combines multiplex polymerase chain reaction with bead-based Luminex technology. Concordance between HPV DNA detection in urine and cervical samples was determined using kappa statistics and McNemar tests. The accuracy of HPV DNA testing in urine samples was evaluated measuring sensitivity and specificity using as reference the results obtained from cervical samples. Statistical analysis was performed using STATA11.2 software. The findings revealed an overall HPV prevalence of 60.00% in cervical samples and 64.72% in urine samples, HPV-16 being the most frequent HPV type detected in both specimens. Moreover, our results indicate that detection of HPV DNA in first void urine provides similar results to those obtained with cervical samples and can be used to monitor HPV vaccination trials and programs as evidenced by the substantial concordance found for the detection of the four vaccine type

Improving HPV vaccine uptake in children, adolescents,and young adults - An umbrella review of interventions

HPV causes about 5% of all cancers worldwide. The most common of these cancers is cervical but the virus is also implicated in cancers of the vagina, vulva, anus, penis, head and neck. A significant proportion of the cancers caused by HPV in Europe are in men. The World Health Organization now has a global strategy for the elimination of cervical cancer. Europe’s Beating Cancer Plan, published by the European Commission in 2021, contains a ‘flagship’ commitment to HPV vaccination. Both strategies share the goal of a 90% vaccination uptake for girls and the Beating Cancer Plan also wants to see an increasing number of boys vaccinated through gender-neutral programmes in every member state. But vaccination rates in Europe, and elsewhere, currently vary widely. Data for the European region shows that only two countries achieved a 90% uptake of girls receiving all their vaccine doses. While several managed over 70% uptake, other countries had coverage rates of below 50% and at least two currently vaccinate fewer than 10% of girls. An important part of the explanation for sub-optimal vaccination rates is low vaccine confidence among parents and carers as well as young people themselves. This can be caused by insufficient information, a lack of trust in health authorities and vaccine manufacturers, and concerns about vaccine safety. But we know that vaccine confidence can be improved, and vaccine uptake increased if the right policies and programmes are put in place. That is why the European Cancer Organisation’s HPV Action Network commissioned this important review of published evidence. Our expert research team took a detailed look at the existing evidence base, by means of an umbrella review (essentially a systematic review of systematic reviews) and identified a range of interventions that have been shown to make a difference in terms of intention to be vaccinated, and uptake rates for HPV vaccination. Compared to many other cancer prevention strategies – such as tobacco control, reducing alcohol consumption, increasing physical activity or tackling obesity – HPV vaccination is easy-todeliver, has an immediate positive health impact and is highly efficacious. In fact, it is probably the single most effective means of cancer prevention in the medical arsenal. We will therefore share these findings widely and encourage HPV vaccination programmes in Europe and beyond to make the best possible use of this evidence. If we can achieve a 90% vaccination rate across Europe, we know we will succeed in eliminating HPV cancers as a public health problem in the region

The role of healthcare providers in HPV vaccination programs - A meeting report

The Human Papillomavirus (HPV) Prevention and Control Board convened a meeting in Bucharest, Romania (May 2018), to discuss the role of healthcare providers (HCPs) in prevention programs, with a focus on HPV vaccination and cervical cancer screening. International and local experts discussed the role that HCPs can play to increase the uptake of HPV vaccine and screening. Experts recommended: 1) increasing HCP norms of getting vaccinated; 2) training providers to make effective recommendations; 3) making culturally appropriate materials available, in local languages; and 4) centralizing and coordinating education and information material, to direct both HCPs and the general public to the best material available

Human papillomavirus vaccination in adults: impact, opportunities and challenges - a meeting report.

For more than a decade human papillomavirus (HPV) vaccine have been implemented in most high-income countries, and more recently also in several low- and middle-income countries. The vaccines are safe and their impact and effectiveness in preventing HPV vaccine type infection and associated diseases has been thoroughly established. Currently, the primary recommended cohorts for immunisation are adolescents, 9-15 years of age but HPV is an ubiquitous infection that is mainly (but not exclusively) sexually transmitted. Sexually active adults remain susceptible to infection and continued transmission of the virus, representing a reservoir of infection in the population. A recent meeting, conducted by the HPV Prevention and Control Board (HPV-PCB), reviewed the current status of HPV vaccination of adults, discussed limitations, challenges and benefits of HPV vaccination of adults, evaluated the effectiveness of HPV vaccination after treatment of post cervical cancer and precancerous lesions, and discussed the potential impact of adult vaccination on cervical cancer elimination strategies in light of the current and future HPV vaccine shortage. HPV-PCB is an independent multidisciplinary board of international experts that disseminates relevant information on HPV to a broad array of stakeholders and provides guidance on strategic, technical and policy issues in the implementation of HPV prevention and control programs. The HPV-PCB concluded that, given the current data available on adult HPV vaccination and the ongoing vaccine supply constraints, it is too early to implement routine vaccination of adults. Many research gaps need to be filled before we have a better understanding of the efficacy and broader public health impact of HPV vaccination in adult women

Long-Term Follow-up of HPV Infection Using Urine and Cervical Quantitative HPV DNA Testing

The link between infection with high-risk human papillomavirus (hrHPV) and cervical cancer has been clearly demonstrated. Virological end-points showing the absence of persistent HPV infection are now accepted as a way of monitoring the impact of prophylactic vaccination programs and therapeutic vaccine trials. This study investigated the use of urine samples, which can be collected by self-sampling at home, instead of cervical samples for follow-up of an HPV intervention trial. Eighteen initially HPV DNA-positive women participating in an HPV therapeutic vaccine trial were monitored during a three-year follow-up period. A total of 172 urine samples and 85 cervical samples were collected. We obtained a paired urine sample for each of the 85 cervical samples by recovering urine samples from six monthly gynaecological examinations. We performed a small pilot study in which the participating women used a urine collection device at home and returned their urine sample to the laboratory by mail. All samples were analyzed using quantitative real-time HPV DNA PCR. A good association (κ value of 0.65) was found between the presence of HPV DNA in urine and a subsequent cervical sample. Comparisons of the number of HPV DNA copies in urine and paired cervical samples revealed a significant Spearman rho of 0.676. This correlation was superior in women with severe lesions. The HPV DNA results of the small pilot study based on self-collected urine samples at home are consistent with previous and subsequent urine and/or cervical results. We demonstrated that urine sampling may be a valid alternative to cervical samples for the follow-up of HPV intervention trials or programs. The potential clinical value of urine viral load monitoring should be further investigated