A person in Arizona has died from pneumonic plague , local health officials said on Friday. Pneumonic plague, which occurs when the bacterium Yersinia pestis gets into a person’s lungs, is both “the least common and most dangerous type of plague,” according to the Cleveland Clinic . All three major types of the plague are rare in the modern day. One type, bubonic plague, was the main cause of the fourteenth century’s Black Death pandemic , which left a trail of death and devastation across