The document summarizes the origins, spread, symptoms, and effects of the bubonic plague, or Black Death, which arrived in Europe in the 14th century from China. Italian merchants carried the disease from Turkey to Europe. Symptoms included fever, boils, and flesh decomposition. At least 30 million Europeans died over two years. The plague significantly reduced population sizes and had widespread economic and social impacts, weakening the feudal system and church. It contributed to new philosophies during the Renaissance by increasing questioning of religion and authority.