Breath sniff test could spot COVID and flu in hospital patients

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age ≥ 18 years old * Having signed a written informed consent * Presenting a NEWS-2 score of 5 (\>4) or one of the individual score criteria rated 3 * Hospitalized in one of the HCL (Hospices Civils de Lyon) departments participating in the study * With clinical signs of acute respiratory infection, or with a clinical presentation of acute community-acquired pneumonia, nasopharyngitis, angina or laryngitis (except for healthy patients) Exclusion Criteria: * Healthy volunteers: * Age: \< 18 years * Alcohol consumption less than 12 hours * Person with co-morbidities such as chronic respiratory failure, type II diabetes, cancerous processes, chronic liver disease, chronic kidney disease * Clinical signs of acute respiratory infection * Persons who are unable to blow into exhaled-air analysis devices (in accordance with instructions for use) * Persons under legal protection * Pregnant women, women in labor or nursing mothers * Persons deprived of their liberty by judicial or administrative decision * Persons under psychiatric care * Persons admitted to a health or social institution for purposes other than research * Adults under legal protection (guardianship, curatorship) * Persons not affiliated to a social security scheme or beneficiaries of a similar scheme * Patients with respiratory symptoms * Age: \< 18 years * Patients whose symptoms have been present for more than 7 days * Persons unable to blow into the device for breath analysis (in accordance with the operating instructions) * Patients suffering from cystic fibrosis * Patients with severe chronic respiratory insufficiency requiring long-term oxygen therapy or NIV (non-invasive ventilation), excluding CPAP (Continuous Positive Airway Pressure) for sleep apnea * Patients under legal protection * Pregnant women, women in labor or nursing mothers * Persons deprived of their liberty by judicial or administrative decision * Persons under psychiatric care * Persons admitted to a health or social institution for purposes other than research * Adults under legal protection (guardianship, curatorship) * Persons not affiliated to a social security scheme or beneficiaries of a similar scheme