User blog:EiplecOco/Bubonic plus Pneumonic

An idea has been proposed that not only was the Bubonic Plague active in Europe at the time of the Black Death, but the Pneumonic Plague was active as well. This could potentially explain the rapid infection and spread of the disease over a short period of time. What would this mean for current AltHist articles now that its entirely possible for killing rats to be half of the solution, rather than THE solution?