Multicenter retrospective and prospective observational study based on the collection - through pre-piloted electronic CRFs - of sequential anonymized data from principal Italian ITP centers representative of national geographical distribution, to evaluate, during a 2-years study period, both the cumulative incidence COVID-19 occurring in patients with prior or ongoing ITP (COVID-19 in ITP) and the cumulative incidence of de novo ITP manifesting during COVID-19 (ITP in COVID-19). Data will be collected to describe the clinical course of patients in the two groups. The enrolment period will last 24 months or terminate at the last day of 1-month-COVID-19 free in Italy, whichever comes first. Each patient will be followed up to the first visit scheduled as per common center practice, including at least six months after hospital discharge or end of quarantine home confinement.
Multicenter retrospective and prospective observational study based on the collection of sequential anonymized data from principal Italian ITP centers, to describe the clinical course of ITP patients becoming infected by SARS-CoV-2 and of COVID-19 patients developing de novo ITP.