Eric Walker added Third plague pandemic - Wikipedia to 1855 Third plague pandemic

Eric Walker added How Pandemics End - The New York Times to a number of topics

Eric Walker added How Pandemics End - The New York Times and Third plague pandemic - Wikipedia to Third plague pandemic, and added Third plague pandemic to Bubonic plague

Eric Walker added a number of topics and a number of links to Bubonic plague, and added Bubonic plague to Bacterial infection and Yersinia pestis