Over-the-counter COVID tests can quickly show whether you are infected with SARS-CoV-2. But if you have a positive result, there’s no equivalent at-home test to assess how long you’re protected against reinfection. Researchers now report a simple, accurate glucose-meter-based test incorporating a novel fusion protein. The researchers say that consumers could someday use this assay to monitor their own SARS-CoV-2 antibody levels.
