![](https://cdn.substack.com/image/fetch/f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2Fc3525a67-cd22-43b8-9221-33a6d1ee5a4e_700x394.jpeg)
Guest Post by David O’Reilly Dr. Hector Carvallo, retired University of Buenos Aires professor of medicine, and his wife Dr. Mirta Carvallo on their last vacation before COVID-19 hit. The unstoppable disease inspired Hector to make one of the most important life-saving discoveries of the pandemic.
ORIGINAL LINK