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

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

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

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