An information processing system, an information processing method, and a computer program capable of easily and reliably identifying a behavioral history of an infected person and extracting close contacts are provided.
According to an embodiment of the present disclosure, there is provided an information processing system including a first information processing device having a function of transmitting a signal, a second information processing device having a function of receiving the signal, and a server device capable of being connected to the second information processing device via the Internet, wherein the server device stores time information, intensity information, first identification information, and second identification information received from the second information processing device in association with each other and extracts one or more pieces of other first identification information stored in association with specific second identification information on the basis of the specific second identification information stored in association with specific first identification information when the designation of the specific first identification information of a specific first information processing device has been received.