ARM 4 1. Age equal to or greater than 18 years of age. 2. Any haematological or solid tumour 3. Current or within the last 12 months received cancer related treatment such as chemotherapy, radiotherapy or targeted small molecule, cellular therapy or immune-modulating therapy 4. Signed written and verbal informed consent by participant or proxy capable of giving consent 5. Laboratory virological confirmation of SARS-CoV-2 by PCR as per local laboratory assays and COVID-19 diagnosis prior to randomisation 6. Hospitalised but has not required mechanical ventilation 7. Pneumonia diagnosed by chest x-ray or computed tomography (CT) revealing infiltrates consistent with pneumonia and SpO2 equal to or less than 94% on room air or requires low-flow oxygen supplementation or requires high-flow oxygen supplementation or non-invasive positive pressure ventilation (NIPPV). 8. Has not participated in other clinical trials for COVID-19 using an immunomodulating monoclonal antibody or kinase inhibitor. Note that participants on dexamethasone, corticosteroids, remdesivir, convalescent plasma and/or hydroxychloroquine with or without azithromycin are not excluded from the study. Agents that have received emergency use authorization and/or are considered by the study site to be standard treatment at the institution for COVID-19 are permitted provided the agent is not an immunomodulating monoclonal antibody or kinase inhibitor. Participation in clinical trials with remdesivir or convalescent plasma is permitted provided that all other eligibility criteria are met. 9. Females of childbearing potential must have a negative serum or urine pregnancy test at screening/baseline. Women of childbearing potential must agree to use adequate contraception (hormonal or barrier method of birth control, abstinence) prior to study entry and for 5 months following their last dose of study drug.

ARM 4 1. Age equal to or greater than 18 years of age. 2. Any haematological or solid tumour 3. Current or within the last 12 months received cancer related treatment such as chemotherapy, radiotherapy or targeted small molecule, cellular therapy or immune-modulating therapy 4. Signed written and verbal informed consent by participant or proxy capable of giving consent 5. Laboratory virological confirmation of SARS-CoV-2 by PCR as per local laboratory assays and COVID-19 diagnosis prior to randomisation 6. Hospitalised but has not required mechanical ventilation 7. Pneumonia diagnosed by chest x-ray or computed tomography (CT) revealing infiltrates consistent with pneumonia and SpO2 equal to or less than 94% on room air or requires low-flow oxygen supplementation or requires high-flow oxygen supplementation or non-invasive positive pressure ventilation (NIPPV). 8. Has not participated in other clinical trials for COVID-19 using an immunomodulating monoclonal antibody or kinase inhibitor. Note that participants on dexamethasone, corticosteroids, remdesivir, convalescent plasma and/or hydroxychloroquine with or without azithromycin are not excluded from the study. Agents that have received emergency use authorization and/or are considered by the study site to be standard treatment at the institution for COVID-19 are permitted provided the agent is not an immunomodulating monoclonal antibody or kinase inhibitor. Participation in clinical trials with remdesivir or convalescent plasma is permitted provided that all other eligibility criteria are met. 9. Females of childbearing potential must have a negative serum or urine pregnancy test at screening/baseline. Women of childbearing potential must agree to use adequate contraception (hormonal or barrier method of birth control, abstinence) prior to study entry and for 5 months following their last dose of study drug.