Easy and fast detection of viruses are crucial in a pandemic. Based on single-nanopore membranes of GSI, an international interdisciplinary team of researchers developed a test method that detects SARS-CoV-2 in saliva, without sample pretreatment, with the same sensitivity as a qPCR test, and in only 2 hours. On top, the sensor can distinguish infectious from non-infectious corona viruses — a crucial innovation.