Systems, methods and devices, and computer program products, for use in testing and verifying symptom-free status of individuals and/or premises

A system for testing and verifying symptom-free status of individuals includes testing terminals and portable personal devices (PPD). The testing terminal includes a symptom testing device which may be a no touch thermometer and tests a user for symptoms such as a fever when they present themselves to the testing terminal. A contactless communication device transfers the new test result securely to the user's portable personal device, such as a mobile phone, together with authentication information identifying the symptom-testing result as originating from a trusted testing terminal. The PDD can authenticate the identity of the user and receive the test result along with the testing terminal authentication information. At a later time and place, the PPD indicates in human and/or machine-readable form information which it can be determined that a symptom-free test result was obtained with a certain recency such as the last six hours, by a trusted testing terminal.