id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-356173-8vrw4mag	Liebig, J.	Should international borders re-open? The impact of travel restrictions on COVID-19 importation risk	2020-10-14		.txt	text/plain	3981	225	49	There are two major factors that influence the expected number of COVID-19 importations: incoming traveller volumes, and incidence rates of the disease in source countries. Figure 2 shows the estimated number of COVID-19 cases imported by citizens/residents and visitors from the ten largest sources before and after the respective travel restrictions were implemented. To decide whether it is safe to open international borders, governments need to understand the relationship between the number of arrivals, incidence rates in countries that act as importation sources and the expected number of COVID-19 importations. We use the monthly number of observed COVID-19 infections amongst travellers arriving into Australia from a given country to estimate the country's true incidence rate. The importation model requires as input the date of arrival into the country under investigation (in our case Australia), the duration of the overseas stay, daily incidence rates of COVID-19 in the country of origin and the lengths of the latent and infectious periods.	./cache/cord-356173-8vrw4mag.txt	./txt/cord-356173-8vrw4mag.txt