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The author examines the following problem: "during great epidemics there are abundant, if not exact records of prevalence, and the resulting mortality can be determined with fair precision... In the intervals between epidemics influenza becomes inextricably confused with other respiratory diseases, having a general clinical resemblance but no definite etiologic entity, so that the record of prevalence and even of mortality is virtually lost." The author therefore looks to what is recorded - i.e. mortality - during years past in an attempt to gain a sense of the prevalence of influenza. The aim is to better contextualize the prevalence of influenza during the 1918 pandemic.
W. H. Frost (Sat,) studied this question.
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