2. State of Art
2.1. Primary Prevention
Primary prevention pertains to the successful HPV vaccination program directed via the government guidelines. In Poland, there are three types of vaccines against HPV available. The first is the bivalent vaccine Cervarix (HPV-2), which is targeted against 16 and 18 HPV variants. Next is the quadrivalent HPV vaccine Gardasil (HPV-4) targeted against 6, 11, 16, and 18 HPV variants, and the final nine-valent vaccine Gardasil 9 (HPV-9) is targeted against 6, 11, 16, 18, 31, 33, 45, 52, and 58 HPV variants.
These vaccines are promoted to both genders. The scheme of HPV vaccine dosing in Poland includes children between the ages of 9 and 14 years old to receive two doses of the HPV-2 vaccine, the second dose is to be given 5–13 months apart from the first dose. If the child receives the second dose earlier than 5 months, a third dose of the HPV-2 vaccine must be administered. The dosing scheme of the HPV-4 and HPV-9 vaccines for children between the ages of 9 and 14 years old is exactly the same as for the scheme of the HPV-2 vaccine.
Regarding individuals aged 15 years old or older, three doses of the HPV-2 vaccine are required. After the first dose, 1 month must pass for the injection of the second dose, and then 6 months must pass to receive the final third dose. Meanwhile, for individuals 15 years old or older receiving the HPV-4 or HPV-9 vaccines, the time spacing between the doses is different. After the first dose, the second dose is given after 2 months, then the third dose is administered after 6 months.
In Poland, the HPV-2 vaccine effectiveness is based on the results in women between the ages of 15 and 25 years old and has a proven immunogenicity in females ranging from 9 to 25 years old. The HPV-4 effectiveness is based on the results from women ranging between 16 and 26 years old and has a proven immunogenicity in females ranging between 9 and 15 years old.
The Polish government states that 50–80% of sexually active men and women will be infected with HPV, half of those individuals being between the ages of 15 and 25 years old. The HPV vaccines successfully lower the risk of developing cervical cancer by 70% and the risk of developing genital warts by 90%, a condition that can predispose the cervix to a precancerous state
[12][10].
As of 1 January 2021, Cervarix, the HPV-2 vaccine, is refunded in Poland for 138.18 zloty (about 30 EUR) per dose for individuals who are 9 years old and older
[13][11]. Gardasil, the HPV-4 vaccine, and Gardasil-9, the HPV-9 vaccine, are currently not refunded in Poland, though they are available. For the Gardasil-9 vaccine, one requires a doctor referral and needs to pay 340.00 zloty (about 73 EUR) per dose
[14][12].
2.2. Secondary Prevention
The secondary prevention of CC involves screening tests detecting precancerous lesions with subsequent treatment using ablative or excisional methods
[15][13]. Currently, there are three methods of cervical precancer screening: cytology-based screening, molecular HPV screening, and visual inspection with acetic acid. Cytology-based screening is taking a sample from the cervix and placing it either on a slide (Pap smear) or in a container of preservative solution (liquid-based cytology, LBC). If there are cell abnormalities discovered, they are classified by the Bethesda System. Molecular HPV testing requires collecting samples of cells with a small brush, placing them in preservative solution, and processing them in laboratory settings. A visual inspection with acetic acid (VIA) observes cell changes that become visible, mainly because they become faintly white after applying dilute (3–5%) acetic acid with a cotton swab. All of those tests require speculum and light sources.
Since abnormal results of screening of the CC methods are not always associated with cancer, a further diagnosis of the changed area is needed. There are three diagnostic methods currently used: colposcopy, biopsy, and endocervical curettage (ECC). Colposcopy involves examination of the cervix, vagina, and vulva under strong lights and magnification; a biopsy requires the removal of a sample of previously visible cells changed during VIA, and ECC is scraping of the cells from the endocervical canal, mainly when the transformation zone cannot be observed. The treatment methods for precancerous changes involve cryotherapy, the loop electrosurgical excision procedure (LEEP—removal of the lesion and entire transformation zone), and cold knife conization (CKC—removal of the cone shaped area including ectocervix and endocervix)
[16][14].
In Poland, it is recommended to perform a Pap smear or LBC in women less than 30 years old every 1–3 years and LBC every 1–3 years in women older than 30 and younger than 70 years old. In the older age group, the Co-Test is recommended after 6–12 months in cases where either the LBC or hrHPV test was positive. In cases where both tests are positive or where the detected changes are associated with p16/Ki67, hrHPV 16, 18, non16, and 18, a LSIL colposcopy is recommended and the Co-Test every 1–3 years in the case of negative results of the colposcopy. In cases where AGC-NOS (atypical glandular cells, not otherwise specified) is detected, there is a recommendation for a colposcopy and endometrial biopsy and a Co-Test within 12 months, followed by regular screening after. In women younger than 30 years old, the recommendations are the same, except for the follow-up cytology 12 months after a negative colposcopy result
[17][15].
2.3. Tertiary Prevention
The tertiary prevention has to do with CC patients and their access to, as well as quality and effectiveness of, care. For a tertiary prevention to be successful, the WHO has identified an effective referral system and good compliance with the treatment, as well as functioning palliative care, to be essential. Referral systems, as well as palliative care, are largely dependent on the resources and structure of the healthcare system in each region. Palliative care can be especially demanding of a system, as it requires a high degree of specialized personnel.
Compliance with treatment is both a good predicting factor for good patient outcomes, as well as a complex problem to tackle. Social factors, such as access to treatment and social relievers (housing during treatment, time off work, etc.), along with consistency regarding treatment facilities, were all positively correlated with increased compliance
[18,19][16][17]. The psychological factors that were associated with increased compliance were the patient’s sense of benefit from the treatment, their sense of disease severity, and their willingness to avoid complications brought on by their condition. Patients who worry about the side effects of treatment or believe that the disease is uncontrollable, however, tend to show lower compliance with treatments. High health literacy and knowledge of the disease and treatments, as well as a positive patient–prescriber relationship, are also factors that increase compliance
[19,20][17][18].
Therapeutic vaccinations are a controversial yet promising treatment for recurrent HPV-related cancers. Currently, there are several clinical trials investigating the effect of vaccinations on disease progression. The theoretical background suggests that vaccinations can prevent recurrent cancer manifestations by increasing the cell-mediated immunity in an already infected patient, as opposed to preventing the initial infection. The ideal target for this type of therapy is those HPV-infected and those with preinvasive lesions, as progression to cancer proper can take several decades. It is worth noting that this use of HPV vaccinations is not, a
t the time of writing this article, approved by the US Food and Drug Administration or the European Medicines Agency, although several clinical trials are currently in progress
[21][19].
3. Analysis of the Current Situation in Poland with Focus on Never Been Screened Persons
Apart from the systemic ideal situation described above, a significant reason for the ongoing high occurrence of CC is the avoidance of regular CC screening. The indicated psychosocial barriers, which prevent patients from participating in prophylaxis, can be classified into three categories: barriers related to facilities/environment, e.g., difficulties in making an appointment, long distance from home to the facility, and problem with transport; barriers related to the personal characteristics of patients, e.g., problems with the organization of time, additional costs, other priorities, lack of awareness of the significance of prophylaxis, and emotional barriers related to the results of the examination itself; and social barriers, e.g., negative experiences with healthcare professionals in the past and lack of support among family and friends
[22][20].
Access to a gynecologist in Poland is actually difficult. According to the NIK report (based on data from the GUS/Central Statistical Office and NFZ/ National Health Fund, NHF) of 2016
[23][21], there were no gynecology and obstetrics clinics in many rural communes. The highest percentage of communes with this type of clinic was found in the Silesian Voivodeship, and yet, 28.7% were communes without gynecological clinics in the total number of communes, while, in Podlaskie Voivodship, where accessibility was at the lowest level, the percentage of the communes without gynecology and obstetrics clinics was 78.8%. The data shows that the lack of availability of a gynecologist is most common in rural communes, despite the fact that 40% of women and newborns live there. As a result, in the voivodeships with the highest percentage of communes without clinics—Podlaskie and Lubelskie—there are 27,000 patients per one gynecological clinic in the countryside, and some women have to travel up to 50 km to the nearest one. With the simultaneous problem of communication exclusion, which affects up to 13.8 million Poles
[24][22], CC prevention becomes an interdisciplinary problem, and apart from medical issues, an important action to improve the situation of high CC incidence is increasing the availability of healthcare services.
However, the most common reported barriers
[22][20] were those from the category of the personal characteristics of patients. Simple psychosocial interventions focused on these barriers, such as leaflets and automatic messages discussing barriers and coping with them and automatic messages
[25[23][24],
26], have been shown to influence participation in screening. The positive impact of GPs (general practitioners) trained in communication skills, including discussing psychosocial barriers to changing health habits in patients, was also indicated
[27][25].
It has been shown that personal invitations are an ineffective way of increasing participation in the CC prevention program; in Poland, in 2009, only 5.5% responded to personal invitation to an examination. Women living in rural areas and with lower education resigned more often than women living in cities with higher education; therefore, the information campaign should cover the first group in particular
[28][26].