Inclusion Criteria

Laboratory confirmed (i.e. PCR-based assay) infection with SARS-CoV-2 (ideally but not
necessarily

≤72 hours before randomization for "antiviral" treatments) OR radiological signs of
COVID-19 in chest X-ray or computed tomography

- Hospitalisation due to SARS-CoV-2 infection, except for sub-study B, which may also
include outpatients with COVID-19

- Requirement of oxygen support (due to oxygen saturation <94% on ambient air or >3%
drop in case of chronic obstructive lung disease)

- Informed Consent obtained, the patient understands and agrees to comply with the
planned study procedures, except for sub-study C: obtaining informed consent may be
impossible due to the severe condition of the patient and may be waived

- ≥18 years of age

- Sub-study A: not on chronic anticoagulation Sub-study B: Sub-study B: blood pressure
≥130/85mmHg in 2 consecutive measurements OR patients with established and treated
hypertension

- Sub-study B: Control group 1: Patients with suspicion of but negative tests for
COVID-19. This group may consist of hospitalized and non-hospitalized patients.

- Sub-study B: healthy volunteers

- Sub-study C: Signs of respiratory deterioration and progressing inflammation: need for
oxygen supplementation, non-invasive ventilation, high-flow oxygen devices or
mechanical ventilation AND CRP levels >5mg/dL (for Pentaglobin only) and ICU admission
(for Pentaglobin only)

- For female patients with childbearing potential: willingness to perform effective
measures of contraception during the study

Exclusion Criteria

- Moribund, or estimated life expectancy <1 month (e.g. terminal cancer, etc.)

- Patient does not qualify for intensive care, based on local triage criteria

- Pregnancy or breastfeeding

- Severe liver dysfunction (e.g. ALT/AST > 5 times upper limit of normal)

- Stage 4 chronic kidney disease or requiring dialysis for direct anticoagulant
treatment

- Allergy or intolerances to experimental substance (ineligibility for treatment arm),
for Asunercept known hereditary fructose intolerance

- Anticipated discharge from hospital within 48 hours (for any given reason)

- Contraindications for treatment arm 2 (lopinavir/ritonavir): severe hepatic
impairment, CYP3A4/5 metabolized drugs, as deemed relevant by treating physicians

- Contraindications for treatment arm 3 (remdesivir): <40kg bodyweight

- Known active HIV or viral hepatitis

- Substudy A contraindications for rivaroxaban: active bleeding or bleeding diathesis,
lesion or condition considered as major risk factor for bleeding, recent brain or
spinal injury, recent brain or spinal or ophthalmic surgery, recent intracranial
hemorrhage, known or suspected esophageal varices, arteriovenous malformations,
vascular aneurysms, major intraspinal or intracerebral vascular abnormalities, ongoing
therapeutic anticoagulation, which will be continued, according to clinical practice

- Sub-study B contraindications for nitrendipine: chronic heart failure, allergies,
hypersensitivities and intolerances, severe hepatic impairment and/or cholestasis,
concomitant therapy with aliskirencontaining medications (for patients with diabetes
mellitus or a GFR<60ml/min/1.73m2), known significant bilateral renal artery stenosis
or renal artery stenosis of a solitary kidney

- Sub-study C contraindications for IL-6 blockade: Contraindications: allergies and
intolerances, active untreated diverticulitis, inflammatory bowel disease, any
treatment with an IL-6 or IL-6R blocking drug (e.g. tocilizumab, sarilumab,
siltuximab) <30 days before study inclusion.

- Sub-study C: Known active tuberculosis.

- Asunercept: females of childbearing potential

- Sub-study C with Pentaglobin: Contraindications to Pentaglobin