Plague is an infectious disease, usually developing symptoms one to seven days after exposure. In the bubonic form there is also swelling of lymph nodes, while in the septicemic form tissues may turn black and die, and in the pneumonic form shortness of breath, cough and chest pain may occur. It has historically occurred in large outbreaks, with the most well known being the Black Death in the 14th century which resulted in greater than 50 million dead.
Also known as mucocutaneous lymph node syndrome, is a disease in which blood vessels throughout the body become inflamed. Discovered in 1961, common symptoms include a fever that lasts for more than five days not affected by usual medications, large lymph nodes in the neck, a rash in the genital area, and red eyes, lips, palms or soles of the feet. In some children, coronary artery aneurysms may form in the heart after 1-2 years.