The Health Sciences Authority has just disputed the findings of a Swiss study that reported heart injuries among a small percentage of people who had received an mRNA vaccine. The study used Troponin levels as an indicator of heart injury. But just what is Troponin, and what is true heart injury? Daniel Martin finds out from Assistant Professor Lin Weiqin, Clinical Director, Heart Failure and Cardiomyopathy Programme and Senior Consultant, Department of Cardiology, National University Heart Centre Singapore. 

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