Estimation of basic reproduction numbers: individual heterogeneity and robustness to perturbation of the contact functionArticle Published on 2013-07-012023-06-01 Journal: Biostatistics (Oxford, England) [Category] 두창, 수두, 홍역, [키워드] Eigenfunction Eigenvalue Infectious disease operator social contact Time-varying frailty. [DOI] 10.1093/biostatistics/kxs054