basic reproduction number of infection R naught Note that CIDO also has a data property called 'has average R0', which can be used to specify the average value of R0 for a specific infectious agent. http://purl.obolibrary.org/obo/NCIT_C173777 R0 https://en.wikipedia.org/wiki/Basic_reproduction_number http://purl.obolibrary.org/obo/APOLLO_SV_00000002 basic reproductive number In epidemiology, the basic reproduction number of an infection is the expected number of cases directly generated by one case in a population where all individuals are susceptible to infection. R zero Bill Duncan, Oliver He measurement datum