1. A method for dynamically determining data-identity information comprising the steps of: determining, in a computer system, spatio-temporal information associated with at least one subject; wherein the spatio-temporal information is determined from multiple sensors; and wherein the spatio-temporal information is insufficient to identify a subject; determining, in the computer system, a mapping between identity information and the spatio-temporal information for at least one subject, wherein the determining is based on inferring the at least one subject's path or trajectory using tagged location information; determining, in the computer system, a mapping between health information and the spatio-temporal information; determining, in the computer system, probable mappings between the health information and the identity information based on the determined mapping between the spatio-temporal information and the identity information, as well as the determined mapping between the health information and the spatio-temporal information; determining mappings between the health information and the identity information from the probable mappings, wherein ambiguity in the determination is resolved using additional spatio-temporal, identity, and health information; and determining, in the computer system, health related procedures based on the determined mappings between the health information and the identity information.