A process, machine, manufacture, or composition of matter, and improvements, illustratively as method of using a machine, the method including: storing data of a population in memory; computing, by a computer accessing the data stored in the memory, a probability of at least one future medical treatment needed by at least one individual having data in the data of a population; ascribing, by the computer applying the computed probabilities, each said individual with one of a plurality of risk stratifications for each said future medical treatment; and producing, by the computer communicating to an output device, output including at least one said ascribed individual in association with the one of the risk stratifications. The method can also include forming, by the computer accessing the data stored in the memory, an association of travel by an individual and a health consequence as a result of the travel by the individual; and generating, at the output device, output including the association. The method can also include determining, by the computer accessing the memory, whether at least one alternative treatment for the future medical treatment may be appropriate for the individual; and producing, at the output device, output tailored responsive to the determination of whether said alternative treatment may be appropriate for the individual.