inclusion criteria: 1. the presence of a voluntarily signed and dated patient informed consent form for participation in this study, or a record of an medical consilium decision justifying patient's participation in case of patient is unable to state his/her will. 2. having either of the following covid-associated respiratory syndromes: * pneumonia with oxygenation saturation spo2 ≤93% (on room air) or respiratory rate greater than 30/min; * acute respiratory distress syndrome (ards) ( pao2/fio2 ≤ 300 mmhg or spo2/fio2 ≤ 315 if pao2 is not available). 3. covid-19 diagnosis based on: * laboratory-confirmed sars-cov-2 infection as determined by polymerase chain reaction method (pcr). or • bilateral changes in the lungs typical for covid-19, based on chest computed tomography results.

inclusion criteria: 1. the presence of a voluntarily signed and dated patient informed consent form for participation in this study, or a record of an medical consilium decision justifying patient's participation in case of patient is unable to state his/her will. 2. having either of the following covid-associated respiratory syndromes: * pneumonia with oxygenation saturation spo2 ≤93% (on room air) or respiratory rate greater than 30/min; * acute respiratory distress syndrome (ards) ( pao2/fio2 ≤ 300 mmhg or spo2/fio2 ≤ 315 if pao2 is not available). 3. covid-19 diagnosis based on: * laboratory-confirmed sars-cov-2 infection as determined by polymerase chain reaction method (pcr). or • bilateral changes in the lungs typical for covid-19, based on chest computed tomography results.

inclusion criteria: the presence of a voluntarily signed and dated patient informed consent form for participation in this study, or a record of an medical consilium decision justifying patient's participation in case of patient is unable to state his/her will. having either of the following covid-associated respiratory syndromes: pneumonia with oxygenation saturation spo2 ≤93% (on room air) or respiratory rate greater than 30/min; acute respiratory distress syndrome (ards) ( pao2/fio2 ≤ 300 mmhg or spo2/fio2 ≤ 315 if pao2 is not available). covid-19 diagnosis based on: laboratory-confirmed sars-cov-2 infection as determined by polymerase chain reaction method (pcr). or • bilateral changes in the lungs typical for covid-19, based on chest computed tomography results.

inclusion criteria: the presence of a voluntarily signed and dated patient informed consent form for participation in this study, or a record of an medical consilium decision justifying patient's participation in case of patient is unable to state his/her will. having either of the following covid-associated respiratory syndromes: pneumonia with oxygenation saturation spo2 ≤93% (on room air) or respiratory rate greater than 30/min; acute respiratory distress syndrome (ards) ( pao2/fio2 ≤ 300 mmhg or spo2/fio2 ≤ 315 if pao2 is not available). covid-19 diagnosis based on: laboratory-confirmed sars-cov-2 infection as determined by polymerase chain reaction method (pcr). or • bilateral changes in the lungs typical for covid-19, based on chest computed tomography results.

inclusion criteria: - 1. signed and dated patient's informed consent for participation in this study, or record of a medical board decision justifying patient's participation in case of patient is unable to state his/her will. - 2. having either of the following covid-associated respiratory syndromes: - pneumonia with oxygenation parameters spo2 ≤93% (on room air) or respiratory rate greater than 30/min; - ards ( pao2/fio2 ≤ 300 mmhg or spo2/fio2 ≤ 315 if pao2 is not available). - 3. covid-19 diagnosis based on: - laboratory-confirmed sars-cov-2 infection as determined by polymerase chain reaction method (pcr). or • bilateral changes in the lungs typical for covid-19, based on chest computed tomography results.

inclusion criteria: - 1. signed and dated patient's informed consent for participation in this study, or record of a medical board decision justifying patient's participation in case of patient is unable to state his/her will. - 2. having either of the following covid-associated respiratory syndromes: - pneumonia with oxygenation parameters spo2 ≤93% (on room air) or respiratory rate greater than 30/min; - ards ( pao2/fio2 ≤ 300 mmhg or spo2/fio2 ≤ 315 if pao2 is not available). - 3. covid-19 diagnosis based on: - laboratory-confirmed sars-cov-2 infection as determined by polymerase chain reaction method (pcr). or • bilateral changes in the lungs typical for covid-19, based on chest computed tomography results.