And there's also the worst kind, septicemic plague which enters the bloodstream. That has a 100% kill rate. But the bubonic plague has up to an 80% death rate if nothing is done. And now, nowadays we have huge, vast amounts of antibiotics and we can normally cure the plague. There is a fear the plague could break that immunity cycle but we're not going to talk about it. We're going to talk about the black death. The black death that's going to kill upwards of 100 million people in Europe in a less than 10 year time span.