This study seems to be saying that the risk of heart infection is what's limiting success in human trials. That seems a much more reasonable explanation. https

This study seems to be saying that the risk of heart infection is what's limiting success in human trials. That seems a much more reasonable explanation. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8095695/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8095695/