Home » Medical » Combining Microfluidic Chip and Cellphone for Simplified COVID-19 TestMedicalCombining Microfluidic Chip and Cellphone for Simplified COVID-19 Test Manny Johnson March 2, 2021 1 Views The stamp-sized microfluidic chip measures the concentration of SARS-CoV-2 nucleocapsid protein in blood serum from a standard finger prick.