Abstract:
:A strong dependency of rubella and measles epidemics on population size was confirmed by 2 types of plots: the cumulative frequency distribution of number of cases per prefecture and the slope of the log-log plots of number of cases per prefecture on the y-axis vs. prefecture population size on the x-axis. These parameters were found to be constant and unique to each infectious agent. The broader cumulative frequency distribution and steeper slope of the log-log plots were characteristic to measles and rubella, i.e., a higher population size was correlated with a disproportionate high incidence of measles and rubella. No such tendency was found in other infections with possible exceptions of pertussis and keratoconjunctivitis. The dependency of rubella and measles on population density was examined by log-log plots of patient number/population vs. population density, which revealed strong population density dependency of rubella; the dependency of measles on population density was equivocal.
journal_name
Jpn J Infect Disjournal_title
Japanese journal of infectious diseasesauthors
Yoshikura Hdoi
10.7883/yoken.67.447subject
Has Abstractpub_date
2014-01-01 00:00:00pages
447-57issue
6eissn
1344-6304issn
1884-2836pii
DN/JST.JSTAGE/yoken/67.447journal_volume
67pub_type
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