@book{218531,
	author = {Centers for Disease Control and Prevention U.S.},
	title = {H1N1 flu (swine flu)},
	publisher = {Centers for Disease Control and Prevention},
	year = {2009-},
	address = {Atlanta, GA},
	note = {Title from web page last updated May 5,2009 (viewed May 6, 2009)},
	url = {http://purl.access.gpo.gov/GPO/LPS112251}
}