https://ijvtpr.com/index.php/IJVTPR/article/view/23 https://www.bitchute.com/video/M3SJ4xN5f2VK/ McCullough is a cardiologist who has now developed a specialty in treating Covid patients, many of whom are at high risk due to heart disease. He became suspicious of the medical bureaucracy because he knows that off-patent meds like Hydroxychloroquine and Ivermectin worked well to treat Covid and they were clearly suppressed in favor of dangerous "vaccines." Since he is a practicing clinician, his knowledge comes through experience. He relies on Michael Yeadon and others who have done a deep dive into the "vaccines" as well. Hell, Dr. Robert Malone who invented mRNA vaccine technology, says these vaxxes now appear very dangerous. Look at his Twitter feed before it gets taken down.