Researching An Elusive Community NCDP Research Team January 03, 2013 From the documentary “Pandemia Invisible:” a team of researchers from the National Center of Disaster Preparedness out of the Mailman school of public Health at Columbia University sets out to conduct a study on undocumented immigrant communities in the U.S. and what would be their outcome in case of a public health emergency. Tags: Documentary, HITN, Elusive Communities, Disaster Research, Trailer