The book reviews developments in the following fields: portable optical detectors; point-of-care diagnostics; paper-based diagnostic devices; point-of-care electrochemical sensors; antibody detection; portable magnetoelastic biosensors; handheld cell-based biosensors; monolithically integrated optoelectronic biosensors; nanosensors; biowarfare detection; defence applications; airport security monitoring; marine security monitoring; travel security monitoring; veterinary science; intelligent patient monitoring; and point-of-care infusion management.