mingi nakkushaiguse epideemiline levik, mis haarab tervet maailmajagu või kogu maailma, kontinentidevaheliselt leviv epideemia, an outbreak of a disease that occurs over a wide geographic area and affects an exceptionally high proportion of the population, outbreak of infectious disease that occurs over a wide geographical area and that is of high prevalence, generally affecting a significant proportion of the world’s population, usually over the course of several months