Severe Acute Respiratory Syndrome CoV 2 Seroprevalence Survey and Vaccination Coverage in the Sickle Cell Population in Ile-De-France
试验速览
- 阶段
- 不适用
- 入组人数
- 880
- 主要终点
- The positivity of total anti-SARS-CoV-2 blood Ig will be determined by the presence of anti-spike protein Ig G and / or anti-nucleocapsid Ig G (post-infectious COVID-19 humoral immunity).
研究概览
简要总结
The objective of this study is to determine the seroprevalence of severe acute respiratory syndrome-CoV-2 in unvaccinated sickle cell patients living in an area with high viral circulation and at risk of high viral transmission, after the 4th epidemic wave of COVID-19 in Ile-de -France, over a period of 3 months (for example, last quarter of 2021).
详细描述
Sickle cell disease is a very widespread genetic disease affecting 300,000 births worldwide, with a prevalence of one affected child for 1736 births in France, the most common genetic disease in France. France is the European country with the highest prevalence of the disease while Ile-de-France is the region with the highest prevalence of sickle cell disease and COVID-19. The medical management of sickle cell patients raises many challenges related to the complexity of their disease and the comorbidities that may be associated with their conditions (arterial hypertension, pulmonary arterial hypertension, nephropathy and renal failure, cerebral vasculopathy).Our seroprevalence study will focus on the sickle cell population living in an area with high circulation of severe acute respiratory syndrome-CoV-2; it will start after the 4th epidemic wave of COVID-19 during the vaccination campaigns, in order to collect on the one hand seroprevalence data (proportion of unvaccinated seropositive sickle cell patients) and persistence of humoral immunity (quantitative) after infection in unvaccinated subjects and on the other hand, to assess the vaccination coverage in this specific population (adults and adolescents) as well as its impact (occurrence of vaccine failures).
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 1 Year 至 —（Child, Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Patient group = children with sickle cell disease:
- •Children over 12 months of age and under 18 at the time of inclusion.
- •Children with a major sickle cell syndrome (SS, "C gene and one sickle hemoglobin (S) gene", Sβ+, Sβ°, SE) followed in one of the centers of competence or reference for rare diseases (CRMR) "Major Sickle Cell Syndromes, Thalassemias and Other Rare Pathologies of Red Blood Cell and Erythropoiesis "from Ile de France.
- •Children not subject to legal protection measures.
- •Children affiliated to a French social security scheme
- •Informed consent signed by one of the two parents.
- •Group of adults with sickle cell disease:
- •Patients over 18 years of age at the time of inclusion (male, female).
- •Patients with a major sickle cell syndrome (SS, "C gene and one sickle hemoglobin (S) gene", Sβ+, Sβ°, SE) followed in one of the centers of competence or reference for rare diseases (CRMR) "Major Sickle Cell Syndromes, Thalassemias and Other Rare Pathologies of Red Blood Cell and Erythropoiesis "from Ile de France.
- •Patients not subject to legal protection measures.
- •Patients affiliated to a French social security scheme
- •Informed consent signed
- •Child-control group:
- •Children over 12 months old and under 18 years old at the time of inclusion.
- •Children without sickle cell disease
- •Children monitored for asthma or with a history of asthma.
- •Children not subject to legal protection measures.
- •Children affiliated to a French social security scheme
- •Informed consent signed by one of the two parents.
排除标准
- •Patient group = sickle cell children :
- •Infants under 12 months of age.
- •Other haemoglobinopathies and heterozygous Haemoglobin AS or AC patients.
- •Children already in a treatment protocol or in the exclusion period from a previous investigation.
- •Children on state medical assistance
- •Adult sickle cell group :
- •Other haemoglobinopathies and heterozygous AS or AC patients.
- •Patients already on a treatment protocol or in the exclusion period from a previous investigation.
- •Pregnant or lactating women.
- •Patients on state medical assistance
- •Child control group :
- •Infants under 12 months of age and adults over 18 years of age.
- •Children already in a treatment protocol or in the exclusion period from a previous study.
- •Children on state medical assistance
结局指标
主要结局
The positivity of total anti-SARS-CoV-2 blood Ig will be determined by the presence of anti-spike protein Ig G and / or anti-nucleocapsid Ig G (post-infectious COVID-19 humoral immunity).
时间窗: 9 months
To determine the seroprevalence of SARS-CoV-2 after the 4th epidemic wave in unvaccinated sickle cell patients (children and adults), living in an area with high viral circulation of SARS-CoV-2 and high risk of viral transmission, in Ile-De-France.
次要结局
- The positivity anti-SARS-CoV-2 serology and anti-spike antibody titre from M0 to M6.(9 months)
- COVID-19 infection (nasopharyngeal RT-PCR Reverse transcription-polymerase chain reaction positivity and/or COVID-19 anti-SARS-CoV-2 serology).(9 months)
- Proportion of patients vaccinated among the patients interviewed and included in the study.(9 months)
- Intensive care unit admission for COVID-19.(9 months)
- Negativity of anti-SARS-CoV-2 serology at M3 and M6.(3 and 6 months)
- Occurrence of post-vaccine side effects (fever, pain, vaso-occlusive crisis, myocarditis, others)(9 months)
- Proportion of COVID-19 infection occurring in vaccinated patients.(9 months)