id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-024188-d7tnku8z	Nissen, Michael D.	Respiratory Infections	2010-03-27		.txt	text/plain	5267	249	39	For example, recent findings from the New Vaccine Surveillance Network in the United States show that despite respiratory syncytial virus (RSV), parainfluenza viruses (PIVs), and human coronaviruses (HCoVs) all being common in early childhood; RSV and PIVs are more common causes of hospital admission with acute febrile and respiratory illness than HCoVs [33, 41] . A review of healthy adult human volunteer studies showed that viral shedding increased sharply between 0.5 and 1 day after influenza virus challenge, peaking on day two; shedding can be detected 24 to 28 h before clinical onset, and has a mean duration of 4.8 days; two-thirds of subjects had symptomatic infection, and total symptom scores peaked on day three [11] . Infections due to common viruses that result in disease severe enough to warrant laboratory testing, notification, or hospitalisation occur in the young, the very old, or both, such as with RSV and influenza [9, 14] .	./cache/cord-024188-d7tnku8z.txt	./txt/cord-024188-d7tnku8z.txt