Rapid, cheap and accurate tests continue to be essential for epidemiological surveillance and for health services to monitor and contain the spread of SARS-CoV-2. Brazilian scientists have contributed to endeavors in this field by developing an electrochemical immunosensor that detects antibodies against the virus. The innovation is described in an article published recently in the journal ACS Biomaterials Science and Engineering. In search of a novel diagnostic method, the group opted for a material frequently used in metallurgy – zinc oxide – and combined it for the first time with fluorine-doped tin oxide (FTO) glass, a conductive material used in...