A new study reveals that the SARS-CoV-2 nucleocapsid protein can spread from infected to uninfected cells, triggering an immune response that mistakenly targets healthy cells. The research identifies how this viral protein binds to cell surfaces and shows that enoxaparin, a common anticoagulant, can block this harmful interaction, pointing to a potential avenue for treatment. These findings shed light on the mechanisms behind severe COVID-19 complications and immune-driven tissue damage.