| Description |
Multicentre observational study aimed at creating several types of frail populations fragile populations, including paediatric cohorts in which we will evaluate the prevalence and clinical spectrum of COVID-19, with particular long-term follow-up, and to monitor the clinical and immunological response immunological response.
Children will be followed for 18 months for the detection of SARS-CoV-2 infection. To assess the incidence of sars cov 2 infection in children aged 1 to 12, to describe the characteristics of COVID-19 and its sequelae in selected frail populations, To describe the prevalence, aetiology (SARS-CoV-2 variants), severity of COVID-19 and the prevalence of reinfections in children aged 1 to 12 years and to assess the seroprevalence of sars cov 2 in children aged 1 to 12 years of age |