id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-334021-ex4z2b75	Tupper, P.	COVID-19's unfortunate events in schools: mitigating classroom clusters in the context of variable transmission	2020-10-22		.txt	text/plain	7701	388	56	Early evidence indicated that schools were low risk and children were unlikely to be very infectious, but it is becoming clear that children and youth can acquire and transmit COVID-19 in school settings and that transmission clusters and outbreaks can be large. Total cluster size is the number of students who are ultimately infected in class (or in both classes in the high school), including the index case. This pattern continues; with a highly infectious index case in a higher-risk room (fourth row): in the baseline protocol in which the main intervention is that symptomatic individuals do not attend, cluster sizes range from 0 to over 20 students in a single classroom (median=4, sympt. We illustrate this by showing results on cluster size for a high school with pre-COVID structure: four 1.25 hour classes every day with largely different students in each.	./cache/cord-334021-ex4z2b75.txt	./txt/cord-334021-ex4z2b75.txt