inclusion criteria: * signed informed consent * confirmed covid-19 (i.e. symptoms + positive test for sars-cov-2) * male or female, age ≥ 55 years * at least two of the following additional risk factors: age ≥ 70 years body mass index \> 25 kg/m2 chronic obstructive pulmonary disease (copd)\* diabetes\* cardiovascular disease\* corticosteroid use \*defined as any disease requiring medical intervention or treatment.

inclusion criteria: * signed informed consent * confirmed covid-19 (i.e. symptoms + positive test for sars-cov-2) * male or female, age ≥ 55 years * at least two of the following additional risk factors: age ≥ 70 years body mass index \> 25 kg/m2 chronic obstructive pulmonary disease (copd)\* diabetes\* cardiovascular disease\* corticosteroid use \*defined as any disease requiring medical intervention or treatment.

inclusion criteria: - signed informed consent - confirmed covid-19 (i.e. symptoms + positive test for sars-cov-2) - male or female, age ≥ 55 years - at least two of the following additional risk factors: age ≥ 70 years body mass index > 25 kg/m2 chronic obstructive pulmonary disease (copd)* diabetes* cardiovascular disease* corticosteroid use *defined as any disease requiring medical intervention or treatment.

inclusion criteria: - signed informed consent - confirmed covid-19 (i.e. symptoms + positive test for sars-cov-2) - male or female, age ≥ 55 years - at least two of the following additional risk factors: age ≥ 70 years body mass index > 25 kg/m2 chronic obstructive pulmonary disease (copd)* diabetes* cardiovascular disease* corticosteroid use *defined as any disease requiring medical intervention or treatment.