Underdetection in a stochastic SIR model for the analysis of the COVID-19 Italian epidemic.

it is less precise when \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\beta _t$$\end{document} β t has a decreasing trend (see Fig. 6 ).

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