[Problem] To provide a system, information processing device, and program capable of assisting in determining the presence or absence of affection by a target disease on the basis of the odor of a medical examinee. [Solution] According to one aspect of the present invention, a system is provided. This system is provided with a first measurement device, a first terminal, an information processing device, a second measurement device, and a second terminal. The first measurement device is provided with a first detection unit. The first detection unit is provided with an odor sensor and is configured so as to be capable of detecting, by using the odor sensor, the odor of air exhaled by a subject. The first terminal is provided with a first measurement information generation unit and a measurement information reporting unit. The first measurement information generation unit is configured so as to be capable of generating first measurement information based on affection information and the detection results from the first detection unit. The affection information indicates whether or not a subject is affected by a prescribed disease. The measurement information reporting unit is configured so as to be capable of reporting, to the information processing device, the first measurement information generated by the first measurement information generation unit. The information processing device is provided with a measurement information acquisition unit, a feature information generation unit, and a feature information provision unit. The measurement information acquisition unit is configured so as to be capable of acquiring the first measurement information reported by the first terminal. The feature information generation unit is configured so as to be capable of generating feature information that indicates features of exhaled air related to a disease on the basis of the first measurement information in which the affection information acquired by the measurement information acquisition unit indicates affection or the first measurement information in which the affection information acquired by the measurement information acquisition unit indicates non-affection. The feature information provision unit is configured so as to be capable of providing, to the second terminal, the feature information generated by the feature information generation unit. The second measurement device is provided with a second detection unit. The second detection unit is provided with an odor sensor and is configured so as to be capable of detecting, by using the odor sensor, odor in air exhaled by a medical examinee. The second terminal is provided with a second measurement information generation unit, a feature information holding unit, and a determination unit. The second measurement information generation unit is configured so as be capable of generating second measurement information based on detection results from the first detection unit. The feature information holding unit is configured so as to be capable of holding feature information provided by the information processing device. The determination unit is configured so as to be capable of determining the possibility that a medical examinee will be affected with a disease on the basis of the second measurement information and the feature information.