Two-Photon Research Inc. (TPR) has launched a diagnostics platform it said improves coronavirus detection via aptamers, small molecules that change shape when binding to a protein at the surface of the SARS-CoV-2 molecule that causes COVID-19. Light shone onto a vial containing a patient’s saliva and the Aptamer Molecular Photonic Beacon (AMPB) generates negative or positive results that are instantly displayed on a smartphone and stored for planning purposes by public health officials.