id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-348010-m3a3utvz	Wolff, Michael	On build‐up of epidemiologic models—Development of a SEI(3)RSD model for the spread of SARS‐CoV‐2	2020-10-13		.txt	text/plain	13018	991	61	(Adequate contacts, reproduction and contact numbers) (i) A contact is called adequate (also effective), if it leads to a transmission of the pathogen from an infectious person to another one, and, if the affected individual is susceptible, then an infection is provoked. In the case of concrete models one uses generally contact and replacement numbers, and , which reflect the current infection behaviour. (i) (Closed-population model) An assumed constant number of community members (see Remark 2.2) seems to be justified, if the infection spreads quickly, approximately within a year, and/or, if there is a balance between births, migration and non-disease-related deaths. (Using , there arise difficulties with the dot indicating the time derivation.) If the model is to be to take a latent period into account, the class of infected is divided into subclasses in the following way.	./cache/cord-348010-m3a3utvz.txt	./txt/cord-348010-m3a3utvz.txt