inclusion criteria: * age equal to or greater than 18 years. * patients with positive antigen test or rt-pcr for sars-cov-2. * patients with less than 7 days from symptoms onset. * patients with indication for outpatient management. * patients with mild disease according to the official guide "pneumonia diagnosis and treatment scheme for novel coronavirus infection (trial version 8)": subjects with mild symptoms, with or without radiological signs of pneumonia, with oxygen saturation\>90% . - able to provided consent to participate.

inclusion criteria: * age equal to or greater than 18 years. * patients with positive antigen test or rt-pcr for sars-cov-2. * patients with less than 7 days from symptoms onset. * patients with indication for outpatient management. * patients with mild disease according to the official guide "pneumonia diagnosis and treatment scheme for novel coronavirus infection (trial version 8)": subjects with mild symptoms, with or without radiological signs of pneumonia, with oxygen saturation\>90% . - able to provided consent to participate.

inclusion criteria: - age equal to or greater than 18 years. - patients with positive antigen test or rt-pcr for sars-cov-2. - patients with less than 7 days from symptoms onset. - patients with indication for outpatient management. - patients with mild disease according to the official guide "pneumonia diagnosis and treatment scheme for novel coronavirus infection (trial version 8)": subjects with mild symptoms, with or without radiological signs of pneumonia, with oxygen saturation>90% . - able to provided consent to participate.

inclusion criteria: - age equal to or greater than 18 years. - patients with positive antigen test or rt-pcr for sars-cov-2. - patients with less than 7 days from symptoms onset. - patients with indication for outpatient management. - patients with mild disease according to the official guide "pneumonia diagnosis and treatment scheme for novel coronavirus infection (trial version 8)": subjects with mild symptoms, with or without radiological signs of pneumonia, with oxygen saturation>90% . - able to provided consent to participate.