In the context of the actual pandemia of the Severe acute respiratory syndromecoronavirus 2 (SARS-CoV-2) which requires a better diagnostic strategy for the managementof patients.The study of volatile organic compounds (VOC) detected in exhaled air or in sweat, is aninnovative research area for respiratory diseases. The analysis of VOC can be done eitherby the technique of the mass spectrometry which allows the identification of each VOC inthe exhaled air or by the technique of electronic nose, simpler and faster, whichprovides an idea of the general profile of the VOC without identifying them. The VOC haveshown their interest in some situations, such as diagnostic or prognostic tool inpatients followed for thoracic tumorous pathology or bronchial or pulmonary vasculardiseases.Moreover, it has recently been shown that properly trained dogs would be able to detectan olfactory signature of SARS-CoV-2 infection with a specificity greater than 90%; thisolfactory signature corresponds to VOCs detectable by the flair of dogs (Nosaïs-Covid19study).Validation of the diagnostic value of VOC analyzes by non-invasive and rapid methods(electronic nose analysis or mass spectrometry; detection by the scent of dogs) for therapid detection and early diagnosis of a SARS-CoV-2 infection warrants the performance ofthis clinical study.