PubMed · 11217247
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F J Soriguer Escofet. [Methodologic obsession].. https://pubmed.ncbi.nlm.nih.gov/11217247/
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Random scale-free networks have the peculiar property of being prone to the spreading of infections. Here we provide for the susceptible-infected-susceptible model an exact result showing that a scale-free degree distribution with diverging second moment is a sufficient condition to have null epidemic threshold in unstructured networks with either assortative or disassortative mixing. Degree correlations result therefore irrelevant for the epidemic spreading picture in these scale-free networks. The present result is related to the divergence of the average nearest neighbor's degree, enforced by the degree detailed balance condition.
Tuberculous infection status in individuals assessed by skin injections of 5 TU PPD-S tuberculin are subject to error. Some truly infected persons may respond with a small skin induration, and some not infected with Mycobacterium tuberculosis can respond with a large induration. Rust and Thomas used data from 701,317 white US Navy recruits seen during 1961-1968 to describe induration size distributions among those infected and not infected, and to provide prevalence estimates. Here, standard errors of prevalence and induration size probabilities are presented through use of the jack-knife methodology.