id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-347806-q2lpwjt8	Ujike, Makoto	Oseltamivir-Resistant Influenza Viruses A (H1N1) during 2007–2009 Influenza Seasons, Japan	2010-06-17		.txt	text/plain	3685	190	54	To monitor oseltamivir-resistant influenza viruses A (H1N1) (ORVs) with H275Y in neuraminidase (NA) in Japan during 2 influenza seasons, we analyzed 3,216 clinical samples by NA sequencing and/or NA inhibition assay. At the beginning of the 2007-08 infl uenza season, however, detection of a substantially increased number of oseltamivir-resistant infl uenza viruses A (H1N1) (ORVs) was reported, mainly in countries in Europe where the prevalence varies, with the highest levels in Norway (67%) and France (47%) (11) (12) (13) (14) . During the 2007-09 seasons, we also addressed NAI surveillance for A/H3N2 and type B circulating in Japan and identifi ed no viruses resistant to both NAIs. Conversely, in March and early April 2009, a new swine-origin infl uenza virus A (H1N1) (now known as pandemic [H1N1] 2009 virus) emerged in Mexico and the United States and spread rapidly to many countries, including Japan (30) (31) (32) (33) .	./cache/cord-347806-q2lpwjt8.txt	./txt/cord-347806-q2lpwjt8.txt