A communications method is established enabling exposure notification, contact tracing and movement tracking by using Bluetooth or other nearby communications technology for communicating with nearby smartphones and mobile devices, and for data exchange both to alert participants of possible exposure to someone who they have recently been in contact with, and who has subsequently been positively diagnosed, or potentially diagnosed as having, a novel coronavirus or other highly contagious disease, and to trace and identify containers, packages, envelopes and other objects that may have been in contact with a person or object carrying or potentially carrying the virus or disease.