COVID-19 Primary Care Platform for Early Treatment and Recovery (COPPER) Study

Inclusion Criteria: * Age ≥18 years * A positive test for SARS-CoV-2 * A GP consultation for deteriorating COVID-19 symptoms Additional inclusion criteria in order to be eligible for randomization to the trial: \- Exercise-induced desaturation, defined as SpO2\<92% (\<90% for COPD patients) and/or an absolute drop of ≥4% in SpO2 after a 1-minute sit-to-stand test OR \- SpO2\<92% (\<90% for COPD patients) in rest with GP's and patient's shared decision to keep patient at home despite this in itself being an indication for referral to hospital Exclusion Criteria: * Inability to understand and sign the written consent form * Inability to perform saturation measurements or sit-to-stand test * Not willing to be admitted to hospital * On the discretion of the recruiting clinician if he or she deems a patient not eligible The following criterion will be used to exclude patients from randomization to the trial: * Contra-indication for dexamethasone