Heparin (IMAGE) Rensselaer Polytechnic Institute Caption But heparin, a blood thinner also available in non-anticoagulant varieties, binds tightly with the surface spike protein on SARS-CoV-2, potentially blocking the infection from happening. Credit Rensselaer Polytechnic Institute Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.