Efficacy of the Sit to Stand Test in the Decision to Hospitalize a Patient Consulting the Emergency Dept for COVID 19

Inclusion Criteria: * Adult (≥18 years old) * Admit to emergency department for suspected SARS-Cov2 infection * SARS-CoV2 infection confirmed by Real Time Polymerase Chain Reaction (RT - PCR) before the first discharge of emergency department * Patient affiliated or beneficiary of a health care insurance * Effective contraception in women of childbearing age. For postmenopausal women, amenorrhea for at least 12 months before the inclusion visit Exclusion Criteria: * Patient presenting criteria for admission to intensive care: signs of acute respiratory distress , respiratory rate\> 30 / min, oxygen dependence \> 6L / min on face mask for an SpO2 ≥ 95% or an arterial oxygen pressure \>8kPa, neurological disorders, systolic blood pressure (SBP) \<90mmHg despite fluid resuscitation, lactates\> 2mmol / L, bradycardia, or heart rate disorders * Patient with SpO2 \<90% in spontaneous ventilation in room air at rest * Patient with functional impairment or deterioration of the general condition leading to the inability to perform STST * Patient with a resting SBP\> 180 mmHg or resting diastolic blood pressure (DBP)\> 100 mmHg or resting heart rate (HR)\> 120 / min * Patient with decompensated or unbalanced cardiac pathology * Patient previously included in the study following a previous admission to emergency department * Patient deprived of liberty, unable to consent freely * Patient non affiliated or beneficiary of a health care insurance