Population history of indigenous peoples of the Americas scope of the epidemics over the years was tremendous, killing millions of people—possibly in excess of 90% of the population in the hardest hit areas—and creating one of "the greatest human catastrophe in history, far exceeding even the disaster of the Black Death of medieval Europe", which had killed up to one-third of the people in Europe and Asia between 1347 and 1351. One of the most devastating diseases was smallpox, but other deadly diseases included typhus, measles, influenza, bubonic plague, cholera, malaria, tuberculosis, mumps, yellow fever and pertussis, which were chronic in Eurasia. This transfer of disease between the
Day of the Dead 20th century because its indigenous people had different traditions. The people and the church rejected it as a day related to syncretizing pagan elements with Catholic Christianity. They held the traditional 'All Saints' Day' in the same way as other Christians in the world. There was limited Mesoamerican influence in this region, and relatively few indigenous inhabitants from the regions of Southern Mexico, where the holiday was celebrated. In the early 21st century in northern Mexico, Día de Muertos is observed because the Mexican government made it a national holiday based on educational policies from the 1960s; it has introduced