Health is a complex state that represents the continuously changing outcome of nearly all human activities and interactions. The invention provides efficient methods and arrays for health monitoring, diagnosis, treatment, and preventive care. The invention monitors a broad range of identifying molecules from a subject, such as circulating antibodies, and the invention evaluates a pattern of binding of those molecules to a peptide array. The characterization of the pattern of binding of such molecules to a peptide array with the methods of the invention provide a robust measure of a state of health of a subject.
