It has been mentioned [17] that patterns of decline could indicate simple wave - like spread of epidemic disease — apparently to reconcile the evidence of such in Central America [6]. (journals.plos.org)
Computational work conducted at Northwestern University has led to a new mathematical theory for understanding the global spread of epidemics. (sciencedaily.com)
«Study of social contact patterns in Hong Kong will give insight into spread of epidemic: Hong Kong was where Severe Acute Respiratory Syndrome (SARS) emerged in 2002 - 2003.» (sciencedaily.com)