A new study demonstrates that a portable electrochemical sensing technology known as eRapid could be an ideal instrument to enable the inexpensive, multiplexed detection of different SARS-CoV-2-directed antibodies at the point-of-care. Researchers showed that specifically engineered eRapid sensors can detect antibodies targeting the virus’ so-called nucleocapsid (N) protein from ultra-small samples of blood plasma and dried blood spots with 100% sensitivity and specificity within less than 10 minutes.