id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-325325-xw7627x9	Skeik, Nedaa	Influenza viruses and the evolution of avian influenza virus H5N1	2007-10-02		.txt	text/plain	4079	254	51	While the clock is still ticking towards what seems to be inevitable pandemic influenza, on April 17, 2007 the U.S. Food and Drug Administration (FDA) approved the first vaccine against the avian influenza virus H5N1 for humans at high risk. While the clock is still ticking towards what seems to be inevitable pandemic influenza, on April 17, 2007 the U.S. Food and Drug Administration (FDA) approved the first vaccine against the avian influenza virus H5N1 for humans at high risk. [8] [9] [10] [11] The 1957 pandemic was caused by the H2N2 subtype, a product of genetic reassortment in hosts infected with both an avian and human influenza virus. Although immunization with human influenza vaccine will not protect against avian influenza strains, it should be considered in poultry workers, and also be given to those traveling to affected areas, two weeks ahead of departure, to prevent co-infection and reassortment.	./cache/cord-325325-xw7627x9.txt	./txt/cord-325325-xw7627x9.txt