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1. ACTIV SARS-CoV-2 registry (Analysis of Chronic Non-infectious Diseases Dynamics after COVID-19 Infection in Adult Patients). Assessment of impact of combined original comorbid diseases in patients with COVID-19 on the prognosis
2. Impact of vaccination status on the clinical course and outcomes of acute COVID-19 period: data from the international registry Dynamics Analysis of Comorbidities in SARS-CoV-2 Survivors (AKTIV-4)
3. Analysis of influence of background therapy for comorbidities in the period before infection on the risk of the lethal COVID outcome. Data from the international ACTIV SARS-CoV-2 registry («Analysis of chronic non-infectious diseases dynamics after COVID-19 infection in adult patients SARS-CoV-2»)
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