https://podcasts.apple.com/us/podcast/spike-protein-drives-explosive-heart-inflammation-in/id1562849542?i=1000577028722
Before the bio weapon shots mio-carditis was rare only 4 cases per million.
Medical studies after the spike protein shots began to show that at first there were 60 per million cases then later studies showed 500 plus from a Brazilian researcher.
More important McCollough seems to have found what causes the sudden death in athletes.
He suggests that adrenaline stimulates heart attacks and quite possibly death in athletes who have been shot up with the bio-weapons containing the spike protein.
All this in the first seven minutes of the video.
Well worth watching. heres dr. McCullough: 