uncommon. >> four and ten teenagers per 100,000 got an inflammation? >> that -- that's right. so, it's an extremely rare event. i mean, we are talking about one in 10,000, on average. and so, that's -- that's quite uncommon. and almost all of those did quite well and -- and had spontaneous resolution. sometimes, requiring hospitalization. so, but the -- but the key point to remember, anderson, is that the rate of myocarditis and other cardiac sequelle from the virus, is possibly as high as 450 per -- per million. so, not only that, we are also talking about other cardiovascular consequences. thrombotic events, strokes. so, all of that has to be kept in mind, as well. so, myocarditis is still an extremely rare event. it is something that we are going to have to watch, and as dr. wen points out, this study