inclusion criteria: 1. being able to understand the study and to give a written informed consent 2. adult hospitalized patients (aged ≥18) confirmed or suspected for covid-19 according to the official general information, epidemiology and diagnosis guidance for covid-19 (sars-cov-2 infection) published by republic of turkey ministry of health showing at least one of the symptoms below: 1. fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarreha without explanation of any cause than covid-19 and history of herself/himself or her/his close contact presenting in the high-risk area of the disease within 14 days prior to the onset of symptoms or 2. at least one of the symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhea without explanation of any cause than covid-19 and close contact with confirmed covid-19 case within 14 days prior to symptoms or 3. fever and at least one of the signs and symptoms of the severe acute respiratory infection (cough and difficulty in breathing) and need for hospitalization due to severe acute respiratory infection (sari) explanation failure of the clinical features other than covid-19 sari: the need for hospitalization in a patient with acute respiratory infection due to fever, cough and dyspnea, tachypnea, hypoxemia, hypotension, wide radiological findings and consciousness developing in the last 14 days. or 4. at least two of the signs and symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhoea without explanation of any cause than covid-19 or 3. patients detected with sars-cov-2 by molecular methods who meet the criteria for possible case of sars-cov-2

inclusion criteria: 1. being able to understand the study and to give a written informed consent 2. adult hospitalized patients (aged ≥18) confirmed or suspected for covid-19 according to the official general information, epidemiology and diagnosis guidance for covid-19 (sars-cov-2 infection) published by republic of turkey ministry of health showing at least one of the symptoms below: 1. fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarreha without explanation of any cause than covid-19 and history of herself/himself or her/his close contact presenting in the high-risk area of the disease within 14 days prior to the onset of symptoms or 2. at least one of the symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhea without explanation of any cause than covid-19 and close contact with confirmed covid-19 case within 14 days prior to symptoms or 3. fever and at least one of the signs and symptoms of the severe acute respiratory infection (cough and difficulty in breathing) and need for hospitalization due to severe acute respiratory infection (sari) explanation failure of the clinical features other than covid-19 sari: the need for hospitalization in a patient with acute respiratory infection due to fever, cough and dyspnea, tachypnea, hypoxemia, hypotension, wide radiological findings and consciousness developing in the last 14 days. or 4. at least two of the signs and symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhoea without explanation of any cause than covid-19 or 3. patients detected with sars-cov-2 by molecular methods who meet the criteria for possible case of sars-cov-2

inclusion criteria: being able to understand the study and to give a written informed consent adult hospitalized patients (aged ≥18) confirmed or suspected for covid-19 according to the official general information, epidemiology and diagnosis guidance for covid-19 (sars-cov-2 infection) published by republic of turkey ministry of health showing at least one of the symptoms below: fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarreha without explanation of any cause than covid-19 and history of herself/himself or her/his close contact presenting in the high-risk area of the disease within 14 days prior to the onset of symptoms or at least one of the symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhea without explanation of any cause than covid-19 and close contact with confirmed covid-19 case within 14 days prior to symptoms or fever and at least one of the signs and symptoms of the severe acute respiratory infection (cough and difficulty in breathing) and need for hospitalization due to severe acute respiratory infection (sari) explanation failure of the clinical features other than covid-19 sari: the need for hospitalization in a patient with acute respiratory infection due to fever, cough and dyspnea, tachypnea, hypoxemia, hypotension, wide radiological findings and consciousness developing in the last 14 days. or at least two of the signs and symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhoea without explanation of any cause than covid-19 or patients detected with sars-cov-2 by molecular methods who meet the criteria for possible case of sars-cov-2

inclusion criteria: being able to understand the study and to give a written informed consent adult hospitalized patients (aged ≥18) confirmed or suspected for covid-19 according to the official general information, epidemiology and diagnosis guidance for covid-19 (sars-cov-2 infection) published by republic of turkey ministry of health showing at least one of the symptoms below: fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarreha without explanation of any cause than covid-19 and history of herself/himself or her/his close contact presenting in the high-risk area of the disease within 14 days prior to the onset of symptoms or at least one of the symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhea without explanation of any cause than covid-19 and close contact with confirmed covid-19 case within 14 days prior to symptoms or fever and at least one of the signs and symptoms of the severe acute respiratory infection (cough and difficulty in breathing) and need for hospitalization due to severe acute respiratory infection (sari) explanation failure of the clinical features other than covid-19 sari: the need for hospitalization in a patient with acute respiratory infection due to fever, cough and dyspnea, tachypnea, hypoxemia, hypotension, wide radiological findings and consciousness developing in the last 14 days. or at least two of the signs and symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhoea without explanation of any cause than covid-19 or patients detected with sars-cov-2 by molecular methods who meet the criteria for possible case of sars-cov-2

inclusion criteria: 1. being able to understand the study and to give a written informed consent 2. adult hospitalized patients (aged ≥18) confirmed or suspected for covid-19 according to the official general information, epidemiology and diagnosis guidance for covid-19 (sars-cov-2 infection) published by republic of turkey ministry of health showing at least one of the symptoms below: 1. fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarreha without explanation of any cause than covid-19 and history of herself/himself or her/his close contact presenting in the high-risk area of the disease within 14 days prior to the onset of symptoms or 2. at least one of the symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhea without explanation of any cause than covid-19 and close contact with confirmed covid-19 case within 14 days prior to symptoms or 3. fever and at least one of the signs and symptoms of the severe acute respiratory infection (cough and difficulty in breathing) and need for hospitalization due to severe acute respiratory infection (sari) explanation failure of the clinical features other than covid-19 sari: the need for hospitalization in a patient with acute respiratory infection due to fever, cough and dyspnea, tachypnea, hypoxemia, hypotension, wide radiological findings and consciousness developing in the last 14 days. or 4. at least two of the signs and symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhoea without explanation of any cause than covid-19 or 3. patients detected with sars-cov-2 by molecular methods who meet the criteria for possible case of sars-cov-2

inclusion criteria: 1. being able to understand the study and to give a written informed consent 2. adult hospitalized patients (aged ≥18) confirmed or suspected for covid-19 according to the official general information, epidemiology and diagnosis guidance for covid-19 (sars-cov-2 infection) published by republic of turkey ministry of health showing at least one of the symptoms below: 1. fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarreha without explanation of any cause than covid-19 and history of herself/himself or her/his close contact presenting in the high-risk area of the disease within 14 days prior to the onset of symptoms or 2. at least one of the symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhea without explanation of any cause than covid-19 and close contact with confirmed covid-19 case within 14 days prior to symptoms or 3. fever and at least one of the signs and symptoms of the severe acute respiratory infection (cough and difficulty in breathing) and need for hospitalization due to severe acute respiratory infection (sari) explanation failure of the clinical features other than covid-19 sari: the need for hospitalization in a patient with acute respiratory infection due to fever, cough and dyspnea, tachypnea, hypoxemia, hypotension, wide radiological findings and consciousness developing in the last 14 days. or 4. at least two of the signs and symptoms of fever, cough, difficulty in breathing, sore throat, headache, muscle or body aches, new loss of taste or smell, diarrhoea without explanation of any cause than covid-19 or 3. patients detected with sars-cov-2 by molecular methods who meet the criteria for possible case of sars-cov-2