Optimization of Patients Long-term Management After the Coronavirus Infection COVID-19

Study Overview
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Brief Summary
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200 participants should be included in the study. There will be three groups: 100 participants with a severe course of the disease 3 months ago, 50 asymptomatic carriers of coronavirus infection 3 months ago and 50 people who were in close contact with patients with confirmed coronavirus infection 3 months ago, but not sick and without antibodies to SARS-CoV-2. The study consists of two visits. At the first visit, after signing the consent to participate in the study, a screening examination will be performed to assess the criteria for inclusion and exclusion in the study. At the second visit, patients who meet the inclusion criteria and do not have exclusion criteria will undergo clinical and instrumental examination, and biological samples will be collected for laboratory testing. The aim of the study is to determine the most significant clinical and laboratory markers of the severity of the outcomes in the period of convalescence of the new coronavirus infection COVID-19. Clinical and laboratory indicators, the number and severity of signs of postcovid syndrome as well as pathological changes in lung tissue according to CT data in the group with covid pneumonia and indicators of immune status, hemostasis, endothelial dysfunction, inflammation, metabolism will be assessed.

Official Title
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Optimization of Patients Long-term Management After the Coronavirus Infection COVID-19

Conditions
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Covid19

Intervention / Treatment
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* Diagnostic Test: Laboratory and instrumental examination


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: For all groups: Informed consent signed by the patient. Men and women aged 18 and over. Group COVID-19 (asymptomatic): Confirmed diagnosis of COVID-19 (positive SARS-CoV-2 RNA PCR test or history of IgM and / or IgG antibodies to SARS-CoV-2) Absence of any clinical symptoms associated with coronavirus infection. Group Healthy: Contact with patients with symptomatic new coronavirus infection COVID-19 in the absence of personal protective equipment for at least 3 days. Absence of any clinical symptoms associated with coronavirus infection Group COVID symptomatic: Confirmed diagnosis of previous COVID-19 (positive SARS-CoV-2 RNA PCR test or presence of IgM antibodies to SARS-CoV-2) in history. A severe course of COVID-19, characterized by one or more of the following symptoms: Respiratory rate ≥ 30 in 1 min Blood oxygen saturation (SpO2) ≤ 93% The ratio of the partial tension of oxygen in arterial blood to the fraction of oxygen during inspiration (PaO2 / FiO2) <300 Lung tissue lesion> 50% and / or according to computed tomography CT-2 and higher Septic shock / sepsis Development of multiple organ failure Cytokine storm Exclusion Criteria: Pregnancy Covid-19 vaccination Any serious medical illness before coronavirus infection, as well as a permanent form of atrial fibrillation Regular intake of anti-inflammatory, antibacterial, cytostatic and immunosuppressive drugs Refusal to participate in the study

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Patients with severe COVID-19 pneumonia<br> | Diagnostic Test: Laboratory and instrumental examination<br>* All patients will undergo a comprehensive examination to identify the consequences of COVID-19<br>|
| Patients who had an asymptomatic COVID-19 3 months ago<br> | Diagnostic Test: Laboratory and instrumental examination<br>* All patients will undergo a comprehensive examination to identify the consequences of COVID-19<br>|
| People who had close contact with patients with confirmed COVID-19 3 months ago but did not get sick<br> | Diagnostic Test: Laboratory and instrumental examination<br>* All patients will undergo a comprehensive examination to identify the consequences of COVID-19<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The presense of postcovid syndrome | Clinical and laboratory indicators The number and severity of signs of postcovid syndrome | through study completion, an average of 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pathological changes in lung tissue according to CT data | CT scan | through study completion, an average of 3 months |