Study on the Epidemiological Characteristics of Female HPV Vaccination in China

Overview

Human papillomavirus (HPV) is currently one of the most common sexually transmitted infections, according to its carcinogenicity is divided into high-risk genotypes and low-risk genotypes, studies have confirmed that carcinogenic HPV type continuous infection leads to higher incidence of condyloma acuminatum and cervical cancer, while increasing the risk of oropharyngeal cancer, vaginal cancer and other related cancers. Human papillomavirus vaccines have been widely used worldwide to prevent cancers of the lower reproductive tract, such as cervical, anal and vulvar cancers. According to the type, it is divided into domestic two-valent (Vantage), imported two-valent (GlaxoSmithKline), four-valent (Merck) and nine-valent (Merck)HPV vaccines. All four vaccines prevent high-risk HPV 16/18 infection, and there are differences between the quadrivalent and nine-valent HPV vaccine prevention genotypes. The protection rate, immunizing target and immunizing procedure of different valence number are slightly different. Studies have shown that after women receive HPV vaccine, the incidence of arm redness, swelling, fever, pain and other adverse reactions is high, often accompanied by menstrual disorders, sleep problems, emotional irritability, fever, dizziness, headache and other adverse reactions. However, the causal relationship between HPV vaccination and symptoms after vaccination at different prices is controversial, and there is little research in this area. Therefore, we intend to design a multicenter, bidirectional cohort study to investigate the relationship between HPV vaccination with different valence numbers and adverse reactions after vaccination in Chinese women, and to further explore the unknown potential factors affecting the protective effect of HPV vaccine.

Based on the database with HPV typing results before HPV vaccination, this study will follow up the population's epidemiological characteristics such as adverse reaction symptoms after HPV vaccination through telephone or face to face, and collect 1 cervical exfoliated cell and 1 peripheral blood tube (5ml) for HPV genotyping detection and HPV neutralizing antibody detection. Meanwhile, participants were recruited in different regions of China for a period of three months. Follow-up was performed at the time of the first dose of HPV vaccine, 1 month after the third dose, and 12 months after the third dose. The corresponding questionnaire was filled in during enrollment and follow-up, and one cervical exfoliated cell was collected at each of the three follow-up visits for HPV genotyping. At the same time, the peripheral blood tubes were collected one month after the third injection to evaluate the effect of HPV vaccine neutralizing antibodies. The multi-center cohort study was conducted to explore the unknown potential factors affecting the protective effect of HPV vaccine, and the relationship between HPV vaccine with different price and adverse reactions after vaccination in Chinese women.