HCV Infection

The VIROPREG study is a French prospective multicenter cohort study that aims to assess the impact of viral infections and antiviral treatments received during pregnancy on maternal and child health. The study focuses on both chronic viral infections: human immunodeficiency virus (HIV), hepatitis B virus (HBV), hepatitis C virus (HCV)\] and on arbovirus infections. This study aims at investigating the following research questions: * What is the rate of mother-to-child transmission for each virus? * What are the effects of maternal infection on (i) pregnancy outcomes, (ii) the mother's physical and psychological health, and (iii) the fetus' health and development, with a focus on long-term psychomotor development in children born to women living with HIV? * What is the impact of antiretroviral and/or antiviral prophylactic and/or therapeutic treatments administered during pregnancy on maternal and fetal health? Mother-child pairs will be followed from pregnancy through delivery and from birth until the child reaches 7 years of age. Each mother-child pair will be enrolled into one of four cohort groups based on the maternal infection. HIV Cohort: Pregnant women living with HIV who participate in the research will: * Be followed according to the routine care schedule from enrollment to post-natal visit usually scheduled in maternity after delivery (6-8 weeks post-partum) * Participate in additional follow-up by phone call or videoconference at 4- and 7-years post-partum for research purposes * Complete questionnaires at inclusion, delivery, 4- and 7- years postpartum * In case of breastfeeding, receive follow-up care aligned with routine schedules for up to 2 years postpartum, including 2 additional visits specifically for research at 2- and 3- months postpartum. * In selected cases: provide blood, umbilical cord blood, colostrum and breast milk samples during follow-up visits for research purposes (pharmacological and virological analyses). Children born to mothers living with HIV and who participate in the research will: * Be followed according to the routine care schedule from birth until 2 years of age * Participate in additional follow-up by phone call or videoconference, addressed to mothers, at 4- and 7- years of age for research purposes. HBV Cohort: Pregnant HBV-infected women who participate in the research will: * Be followed according to the routine care schedule from enrollment to post-natal visit usually scheduled in maternity after delivery (6- 8 weeks post-partum) * Complete questionnaires at inclusion and delivery * Provide blood samples during follow-up visits for research purposes. Children born to HBV-infected mothers and who participate in the research will: * Be followed according to the routine care schedule from birth to 2 years of age * Participate in additional follow-up for research purposes at 3 months and 18-24 months of age. HCV Cohort: Pregnant HCV-infected women who participate in the research will: * Be followed according to the routine care schedule from enrollment to post-natal visit usually scheduled in maternity after delivery (6 - 8 weeks post-partum) * Complete questionnaires at inclusion and delivery * Provide blood samples during follow-up visits for research purposes. Children born to HCV-infected mothers and who participate in the research will: * Be followed according to the routine care schedule from birth until 2 years of age * Attend additional follow-up visits scheduled at 3 and 9 months of age for research purposes. Arbovirus Cohort: Pregnant women infected with arbovirus who participate in the research will: * Be followed according to the routine care schedule from enrollment to delivery * Participate in additional follow-up for research purposes at 4 years after delivery. * In case of breastfeeding, women will be monitored for research purposes at Day 7 and Day 30 postpartum * Complete questionnaires at inclusion, Day 7-10 from the inclusion, delivery and 4 years after delivery * Provide blood, amniotic fluid, placenta, umbilical cord blood, colostrum and breast milk samples during follow-up visits for research purposes. Children born to mothers infected with arbovirus and who participate in the research will: * Be followed according to the routine care schedule from birth until 2 years of age. * Participate in additional follow-up for research purposes at inclusion, Day 7 and Day 30 after inclusion * Participate in additional follow-up by phone call or videoconference, addressed to mothers, at 4- and 7- years of age for research purposes.

The goal of this observational study is to assess the effectiveness of targeted screening for Hepatitis B (HBV) and Hepatitis C (HCV) infections in adults aged 18 to 50 from the Chinese community residing in Milan. The main questions it aims to answer are: * Does community-based, culturally sensitive screening increase the detection of undiagnosed HBV and HCV infections in this high-risk population? * What is the level of adherence, satisfaction and awareness regarding rapid testing methods in this community? Participants will: * Receive pre-test counseling in Italian or Chinese with the help of an interpreter * Complete a brief, anonymous questionnaire on demographics, risk factors and awareness of HBV/HCV * Undergo capillary rapid testing for HBV and/or HCV * Receive test results during the same visit * Complete a short post-test satisfaction questionnaire The study will be conducted in public spaces within Milan's Chinatown, during monthly sessions, until 1,000 participants are enrolled. Each session will last approximately 30-60 minutes per participant.

The objectives of this study are to improve HCV linkage-to-care in Chinese women and provide theoretical basis for the scientific formulation of HCV prevention and control strategies for pregnant women. To understand the epidemiological changes and status of hepatitis C virus (HCV) infection in pregnant women in Shaanxi province in recent 10 years, and to analyze the main influencing factors of hepatitis C infection in pregnant women.

Background: Currently used direct-acting antivirals (DAA) share pharmacokinetic pathways with many comedications commonly used in patients with chronic hepatitis C virus (HCV) infection, therefore drug-drug interactions (DDI) might exist. Although extensive (DDI) verification is recommended by most clinical practice guidelines, real-world studies have shown that approximately one-tenth of patients on DAA therapy also take concomitant medication with the potential for significant interactions. Despite the risk of significant DDI when patients are administered DAA and a concomitant medication, to date, there is very little information on whether these interactions translate into changes in the toxicity or efficacy of any involved DAA or comedication in clinical practice. Clarifying this issue is a critical point, as the DDI profile of the currently used DAA is not the same, with SOF/VEL showing a lower risk of significant DDI than GLE/PIB. Thus the objective of this study is to compare the percentage of comedication switch, withdrawal, or dose reduction at treatment initiation and during treatment with GLE/PIB or SOF/VEL. Methods: The patients will be enrolled from the GEHEP 001/HEPAVIR cohort. "The HEPAVIR-DAA cohort (NCT02057003)", includes HIV/HCV-coinfected patients, and "the GEHEP-MONO cohort (NCT02333292)", that includes HCV mono-infected individuals, are ongoing prospective multicenter cohorts of patients receiving DAA combinations prescribed in clinical practice, outside clinical trials. Main Study End Point will be the frequency of comedication switch, withdrawal or dose reduction at treatment initiation (index date) and during treatment with GLE/PIB or SOF/VEL.